JP6232677B2 - Fall prevention device - Google Patents

Description

The present invention reliably prevents the fall of an article on the shelf with an anti-fall bar when a vibration such as an earthquake occurs on an existing loading shelf, and easily releases and restarts the fall prevention bar when the article is taken in and out. Can
Since the device is simple and has a small number of parts, it is easy to assemble and install, and since the device is thin enough to be mounted on the shelf, it can minimize the impact on the load of goods on the shelf. The present invention relates to an article fall prevention device.

  Patent Document 1 discloses a fall prevention frame in which a fall prevention bar is bridged corresponding to a shelf plate between a rail provided along both side edges of a front opening of a rack body and a side frame slidably attached to the rail. And a tension coil spring that urges the fall prevention frame upward, and locks the fall prevention frame in a lowered position against the urging force of the tension coil spring and releases the lock by detecting vibration And an anti-falling device for a rack with a lock releasing device that raises the fall-preventing frame by a biasing force of the tension coil spring and arranges the fall-preventing bar at a front opening above the corresponding shelf. Is disclosed.

  In Patent Document 2, a horizontal member that can be moved up and down between the upper and lower predetermined positions of the horizontal shelf along the shelf front surface, and the horizontal member is urged and supported at a predetermined upper position to store the stored article. An urging means capable of preventing the fall, and an engagement for detachably engaging and supporting the urging means against the urging means for urging and supporting the horizontal member at a predetermined position below so as not to affect the loading and unloading of stored articles. And a seismic sensing means for releasing the engagement of the support mechanism. When the seismic sensing means senses a vibration, the engagement support mechanism is activated, the engagement support is released, and the horizontal member moves upward, and the predetermined height is reached. A storage article fall prevention device that is supported by and prevents the fall of the storage article is disclosed.

  In Patent Document 3, a biasing means that biases and supports the horizontal member at a predetermined position in the lower part in Patent Document 2 so as not to affect the loading and unloading of the stored article is supported at the upper predetermined position. Similar to Document 2, when the seismic sensing means senses vibration, the engagement support mechanism is actuated, the engagement support is released, and the horizontal member moves downward, opposite to Patent Document 2, and is supported and stored at the predetermined height. A stored article fall prevention device that prevents the fall of an article is disclosed.

  In Patent Document 4, a mounting arm attached to a front post of a bookshelf is provided with a support arm portion in which a rotation support shaft is attached to a front end portion of a book holding hook and a support portion via a mounting tool. A rotation mechanism in which the rotation support shaft is fitted into a circular hole and a rectangular hole connected to the circular hole to restrict the forward rotation of the support arm portion and hold the book holding book in front of the books A shelf-mounted object fall prevention device is disclosed.

  Patent Document 5 includes hollow struts having a plurality of locking holes at predetermined intervals on both sides of the front opening portion in the vertical direction on the inner surface side, and having openings on the rear surface side. A shelf plate is attached to each of the supporting holes by using the locking holes, and shafts are provided at both ends between the both struts, and a substantially horizontal regulating bar is provided between the arm extending from the shaft and the end of the arm. It is possible to rotate both shafts to a pair of opposing locking holes on both columns above the shelf with a restricting member with weight attached to an attachment rod extending from at least one shaft to the opposite side of the arm A seismic-type article fall prevention device for a bookcase locked in the above manner is disclosed.

JP 2002-112845 A Japanese Patent Laid-Open No. 9-14490 JP-A-9-173170 Japanese Patent Laid-Open No. 11-276276 Japanese Patent Laid-Open No. 2000-14467

  As described above, Patent Documents 1 to 5 are provided with a fall prevention bar horizontally above the shelf board in order to prevent the article on the shelf from falling, and take a method of preventing the article on the shelf from falling. Patent Documents 1 to 4 have a large number of components, are complicated to assemble, and cannot be manufactured at low cost. Further, Patent Documents 1, 4, and 5 require a dedicated column for the shelf body, and cannot be mounted on an existing shelf as it is. Patent Documents 1 to 3 and 5 are fall prevention devices equipped with a vibration sensing mechanism, but the sensing mechanism is a pendulum type rocking mechanism, and it may not be able to operate due to resonance due to irregular vibrations. In addition, the fulcrum that moves up and down while rotating the fall prevention bar is one place, and when the vibration continues for a long time, the fall prevention bar swings up and down around the fulcrum, and the position for supporting the article on the shelf changes, When the article on the shelf is pushed forward when it is lowered, the balance may be lost and the article may easily fall. Patent Document 4 does not include a pendulum type swing mechanism, but the case where the fall prevention bar is once shifted upward, rotated 180 ° up or down, and the operation of lowering is installed at the front position of the article on the shelf. It was complicated because it was necessary to carry out articles on and off the shelf.

  The fall prevention device disclosed by the present invention has a unique body plate structure that significantly reduces the number of parts, and at the same time, reduces the number of assembly steps, and can be easily and inexpensively attached to a shelf board. In addition, there is no need for a dedicated column or fixture for installation, and it can be mounted on an existing shelf as it is, and the fall prevention bar is always located in front of the item on the shelf, so the item on the shelf due to malfunction The unique body plate structure eliminates the phenomenon that the fall-prevention bar drops down during vibration, and when the items on the shelf are put in and out, the fall-prevention bar is temporarily pulled to the lower side. Thus, there is provided a fall prevention device that can be fixed to the front and lower side of the shelf as it is and can be returned to the front of the article on the shelf with a single touch by pushing the fall prevention bar to the back.

  The fall prevention device disclosed by the present invention includes left and right body plates (2) and (3) that are attached to the front ends of both ends of the upper surface of the shelf board (1) with screws, double-sided tape and adhesive, a fall prevention bar (6), Left and right arms (4) and (5) to which the fall prevention bar (6) is fitted, left and right arms (4) and (5) to which the fall prevention bar (6) is fitted, and the left and right body plates (2) ( A rotating dowel (7) for assembling 3) and a tension spring (8) are provided.

  In the fall prevention device, the left and right main body plates (2) and (3), the fall prevention bar (6), the left and right arms (4) and (5), the rotating dowel (7), and the tension spring (8) 5 Consists of various types of parts, simple structure, easy assembly and low cost.

  In the above fall prevention device, since it is attached on the shelf board (1) with screws, double-sided tape or adhesive, it can be attached to an existing stacking shelf without any restrictions.

In the fall prevention device, the fall prevention bar (6) is always located in front of the article on the shelf by the biasing force of the tension spring (8). Therefore, when a vibration such as an earthquake occurs, the article on the shelf is reliably prevented from dropping by the fall prevention bar (6), and the article on the shelf moves forward in a long-lasting vibration, and the fall prevention When the bar (6) is pushed forward, the fall prevention bar swings up and down around the left and right arm end holes (4d ') (5d'), the position for supporting the article on the shelf changes, and Guide grooves (2b) and (3b) are provided in the left and right main body plates (2) and (3) so that the article on the shelf is pushed forward and the balance is not easily lost. (2b) (3b) The upper and lower body plate lead-in grooves (2d) (3d) that extend forward in a bowl shape are provided. On the other hand, the rotating dowels inserted into the left and right arm end holes (4d ') (5d') (7) Left and right body plate rotation support Box (2e) by which it possible deviated back and forth in (3e), the left and right arms (4) to the left and right body plate pull grooves (2d) (3d) Gaidodabo was attached to (5) (4b) ( 5b) is pulled in and prevents the left and right arms from moving up and down, and the left and right arms (4) (5) and the fall prevention bar (6) are always located at the front of the same height of the article on the shelf. Realize and more reliably prevent items from falling on the shelf.

  On the other hand, since the fall prevention bar (6) is always in the fall prevention operation state located in front of the article on the shelf, there is a problem in taking in and out the article on the shelf. Accordingly, left and right arms (4) (5) in which guide grooves (2b) (3b) are provided in the left and right body plates (2) (3) and the fall prevention bar (6) is fitted to the fall prevention bar (6). The left and right arm guide dowels (4b) and (5b) attached to the left and right arm plate dowels (2b) and (3b) are moved downward along the guide grooves (2b) and (3b). The fall prevention bar (6) can be fixed to the front and lower sides of the shelf board (1) to facilitate loading and unloading of articles on the shelf. At this time, the tension spring (8) is provided with spring hook holes (4c) (5c) attached to the left and right arms (4) (5) for supporting the fall prevention bar (6) and left and right main body plates (2) (3). ) Is attached to the left and right body plate spring hooks (2g) and (3g), and the left and right arms (4) and (5) are always attracted upwards and backwards. If pushed, the left and right arm guide dowels (4b) and (5b) are disengaged from the left and right main body plate arm lock grooves (2c) and (3c), and easily return to the front position of the article on the original shelf, and the fall prevention operation state is released. Can be done easily.

  In the fall prevention device, the fall prevention bar (6) is always positioned in front of the article on the shelf by the urging force of the tension spring (8). Therefore, when a vibration such as an earthquake occurs, the article on the shelf is prevented from falling by the fall prevention bar (6). As a result, the article on the shelf is not damaged, and the article on the shelf is dropped. There is no human injury or other damage to the goods, and the goods on the shelves can continue to be used, a blame path can be secured, and any damage can be minimized.

  Alternatively, if the cost is low and the handling is simple, the use to more loading shelves can be expanded, contributing to more safety and security.

The fall prevention device of the present invention is attached to the shelf board of the loading shelf, the upper stage maintains the fall prevention bar at the upper part, and the lower stage fixes the fall prevention bar to the front lower part of the shelf board in the state where it is placed in front. FIG. It is a side view maintaining the fall prevention bar of the fall prevention device of the present invention in the upper part. It is a side view which is fixing the fall prevention bar of the fall prevention apparatus of this invention to the shelf board lower front. It is a side view by which the fall prevention bar of the fall prevention device of the present invention is pushed forward by vibration. It is a perspective view of the right-and-left main body plate of the fall prevention device of the present invention. It is a perspective view of the left and right arms of the fall prevention device of the present invention. It is a perspective view of the fall prevention bar of the fall prevention device of the present invention. The fall prevention device with the seismic mechanism of the present invention is attached to the shelf of the stacking shelf, the upper stage maintains the fall prevention bar at the upper part, and is placed in front of the article on the shelf, while the lower stage places the fall prevention bar on the shelf. It is a perspective view of this loading shelf in the state fixed to the board front lower part. It is a side view which is maintaining the fall prevention bar in front of a shelf board with the fall prevention apparatus with a seismic mechanism of this invention. It is a side view which is maintaining the fall prevention bar in the upper part with the fall prevention apparatus with a seismic mechanism of this invention. It is a side view by which the fall prevention bar is pushed ahead by vibration in the fall prevention device with a seismic mechanism of the present invention. It is a perspective view of the right-and-left main body plate of the fall prevention apparatus with a seismic mechanism of this invention. It is a perspective view of the right and left arms of the fall prevention device with a seismic mechanism of the present invention. It is a perspective view of the weight of the fall prevention apparatus with a seismic mechanism of the present invention. It is a perspective view which attaches the left and right arms to the left and right main body plate rotation support box in the fall prevention device of the present invention. It is the perspective view which attached the left and right arm to the left and right main body plate rotation support box with the fall prevention device with a seismic mechanism of the present invention.

A fall prevention device according to the present embodiment will be described with reference to the drawings.
As shown in FIG. 1, the fall prevention device of the present embodiment has left and right main body plates (2) and (3) attached to front ends of both ends of the upper surface of the shelf board (1), and the left and right main body plates (2) and (3). Are provided with left and right arms (4) and (5) each fitted with a fall prevention bar (6) at the tip.

  In the upper diagram, the fall prevention bar (6) is positioned in front of the article on the shelf, and is in a state of preventing the article on the shelf from falling whenever a vibration such as an earthquake occurs. On the other hand, in the lower figure, the fall prevention bar (6) is moved downward so as not to interfere with the loading and unloading of articles on the shelf, and is fixed to the front and lower side of the shelf board (1). It is in an easy state and the shelf is open.

Next, a description will be given with reference to FIGS.
First, in FIG. 2, the fall prevention device of the present invention attaches and fixes the lower parts of the left and right main body plates (2) and (3) to the front ends of both ends of the upper surface of the shelf board (1) with screws, double-sided tape or adhesive. Then, the left and right arms (4) and (5) shown in FIG. 6 are fitted with left and right arm tip projections (4a) and (5a), respectively, and a fall prevention bar (6) is fitted to the left and right main bodies shown in FIG. The left and right arm ends (4d) and (5d) are respectively inserted from the left and right body plate slit holes (2a) and (3a) on the front surface of the plates (2) and (3), and attached to the left and right arms (4) and (5) shown in FIG. The left and right arm guide dowels (4b) and (5b) pass through the left and right body plate slit wide holes (2a ′) and (3a ′) on the front surface of the left and right body plates (2) and (3) shown in FIG. Inside the plates (2) and (3), the left and right main bodies The left and right main body plate guide grooves (2b) and (3b) are inserted into the left and right body plate guide grooves (2b) and (3b) through the plate groove wall cutout holes (2b ') and (3b'). At the same time, the left and right arm ends (4d) and (5d) are The left and right main body plate rotation support boxes (2e) and (3e) below the left and right main body plates (2) and (3) shown in FIG. 15 are inserted into the left and right main body plate rotation support box slit holes (2e ′) and (3e ′). As shown, the left and right arm end holes (4d ') (5d') are viewed from the left and right body plate notch holes (2f) (3f), and the left and right arm end holes (4d ') (5d') (7) is inserted, and the left and right arm springs (4c) (5c) attached to the left and right arms (4) and (5) and the left and right body plate spring hooks (2g) (3g) are hooked with the tension springs (8). Left and right arms (4) (5 ) And the fall prevention bar (6).

  The fall prevention bar (6) is fitted to the left and right arms (4) and (5) so that the left and right arm tips (4a) and (5a) have a cross section so that the left and right arms (4) and (5) face each other in parallel. It is preferable that the shape and the cross-sectional shape of the fitting hole of the fall prevention bar (6) are engaged with each other, and the left and right arms (4) and (5) are opposed in parallel so that there is no displacement.

The fall prevention device of the present invention is assembled with the structure as described above, and in order to operate it, the left and right arm guide dowels (4b) and (5b) are freely movable up and down in the left and right body plate guide grooves (2b) and (3b). When the hand is released, it is fixed to the upper part of the left and right body plate guide grooves (2b) (3b) by the urging force of the pulling spring (8), and the fall prevention bar (6) is placed in front of the article on the shelf. When a vibration such as an earthquake occurs by maintaining the horizontal position, articles on the shelf are prevented from falling by the fall prevention bar (6).

  In order to prevent the article on the shelf from falling down, the fall prevention bar (6) is always fixed at the top and is basically placed at the front horizontal position of the article on the shelf. If a rod or pipe having a diameter of 10 mm or less is used, the effects of the present invention can be obtained without impairing the viewing and aesthetics of the items on the shelf.

In the above, even when vibration such as an earthquake continues for a long time, when the article on the shelf moves forward and pushes the fall prevention bar (6) forward as shown in FIG. (4) The fulcrum supporting (5) is one place, and the fall prevention bar (6) swings in the vertical rotation direction around the left and right arm end holes (4d ') (5d'), and the article on the shelf is displaced. When the support position was changed and lowered, there was a risk of falling out of balance when the article on the shelf was pushed forward. Therefore, the left and right main body plate guide grooves (2b) and (3b) have upper left and right main body plate guide grooves (2b) and (3b), and the left and right main body plate guide grooves (2d) (3d) On the other hand, left and right body plate rotation support boxes (2e) and (3e) are provided below the left and right body plates (2) and (3), and the left and right arm arm end holes (4d ′) and (5d ′) are provided. By providing a space that allows the inserted rotating dowel (7) to be displaced back and forth in the left and right body plate rotation support box (2e) (3e), the left and right arms (4) and (5) are shifted back and forth. The left and right body guide dowels (4b) and (5b) attached to the left and right arms (4) and (5) are drawn into the left and right main body plate pull-in grooves (2d) and (3d). 4) (5) and the fall-preventing bar (6) are always positioned in front and horizontally at the same height of the article on the shelf without shifting up and down, and more reliably the article on the shelf. The fall was prevented.

  In the above, since the fall prevention bar (6) is always positioned in front of the article on the shelf and is in an operating state to prevent the article on the shelf from falling so that a vibration such as an earthquake may occur at any time, There is a hindrance to putting in and taking out goods. Therefore, as shown in FIG. 3, left and right main body plate arm locking grooves (2c) (3c) following the left and right main body plate guide grooves (2b) (3b) are provided in front of the lower portions of the left and right main body plate guide grooves (2b) (3b). Left and right body guide dowels (4b) and (5b) provided on the left and right arms (4) and (5) are provided forward from the lower part of the left and right body plate guide grooves (2b) and (3b), and further several millimeters above. It is moved down along the left and right body plate guide grooves (2b) and (3b), and is fixed to the deepest part of the left and right body plate arm lock grooves (2c) and (3c) just by pulling forward, thereby the fall prevention bar (6) is fixed to the front and lower side of the shelf board (1) so that the work can be performed without any trouble in taking in and out the articles on the shelf. At this time, the tension spring (8) includes left and right arm spring hanging holes (4c) (5c) attached to the left and right arms (4) and (5) that support the fall prevention bar (6) and left and right body plate spring hanging holes ( 2g) (3g) and the left and right arms (4) and (5) are always attracted upwards and backwards, so if the fall prevention bar (6) is pushed lightly downward and rearward, the left and right arm guide dowels (4b) ( 5b) is disengaged from the deepest part of the left and right main body plate arm lock grooves (2c) and (3c), returns to the left and right main body plate guide grooves (2b) and (3b), and momentarily the biasing force of the tension spring (8) The left and right main body plate guide grooves (2b) (3b) are moved upward along the left and right body plate guide grooves (2b) (3b), and the fall prevention bar (6) fitted to the left and right arms (4) and (5) as shown in FIG. It returns to the front position of the article on the shelf and returns to the fall prevention operation state.

As described above, the left and right body plate guide grooves (2b) and (3b), the left and right body plate arm lock grooves (2c) and (3c), and the left and right body plate retracting grooves (2d) provided in the left and right body plates (2) and (3). The movements of the left and right arms (4), (5) and the fall prevention bar (6) can be controlled by (3d). In the prior art, the left and right arms (4), (5) and the fall prevention bar (6 However, in the present invention, it is possible to omit them only with the left and right main body plates (2) and (3). The switching of the released state is easily realized at low cost.
In order to carry out the present invention more reliably, it is desirable that the detachable shelf board (1) is installed in a state of being fixed to the stacking shelf main body in advance.

A fall prevention device with a seismic mechanism according to this embodiment will be described with reference to the drawings.
As shown in FIG. 8, the fall prevention device with a seismic mechanism of this embodiment has left and right body plates (12) and (13) attached to the front ends of both ends of the upper surface of the shelf board (1). 12) and 13) have left and right arms (14) and (15) each fitted with a fall prevention bar (6) at the tip, and weights are provided on the body portions of the left and right arms (14) and (15). It is slidably attached.

  In the upper diagram, the fall prevention bar (6) is positioned in front of the article on the shelf, and is in a state of preventing the article on the shelf from falling when vibration such as an earthquake occurs. On the other hand, in the lower figure, the fall prevention bar (6) is moved downward so as not to interfere with the loading and unloading of articles on the shelf, and is fixed to the front and lower side of the shelf board (1). It is in an easy state and the shelf is open.

Next, a description will be given with reference to FIGS.
First, in FIG. 9, the fall prevention device with a seismic mechanism of the present invention is such that the lower part of the left and right main body plates (12) (13) is attached to the front ends of both ends of the upper surface of the shelf board (1) with screws, double-sided tape or adhesive. On the other hand, the fall prevention bar (6) is fitted to the left and right arm tip protrusions (14a) and (15a) attached to the respective tip portions of the left and right arms (14) and (15) shown in FIG. Left and right arm ends (14d) and (15d) are respectively inserted from left and right body plate slit holes (12a) and (13a) in front of the left and right body plates (12) and (13) shown in FIG. The left and right arm guide dowels (14b) and (15b) attached to (15) are the left and right body plate slit wide holes (12a ') and (13a') on the front surface of the left and right body plates (12) and (13) shown in FIG. Through The left and right main body plates (12) and (13) are inserted into the left and right main body plate guide grooves (12b) and (13b) through the left and right main body plate groove wall cutout holes (12b ') and (13b'). At the same time, the left and right arm ends (14d) (15d) are inserted into the weight holes (11a) of the weight (11) shown in FIG. 14, and the weight (11) is attached to the body of the left and right arms (14) (15). , as left and right body plate shown in the right diagram of FIG. 12 (12) right and left body plates rotary support box slit of the back of a (13) right and left body plates rotary support box (12e) (13e) (12e' ) (13e ') And the left and right arm ends (14d) (15d) are inserted into the left and right arm end holes (14d') (15d ') as shown in FIG. The left and right arm springs attached to the left and right arms (14) and (15) are inserted into the left and right arm end holes (14d ') and 15d' from the side, and a rotating dowel (7) is inserted from the side. Pull springs (8) are hooked on the hook holes (14c) (15c) and the left and right body plate spring hook holes (12g) (13g) to support the left and right arms (14) (15) and the fall prevention bar (6). And assemble.

  The fitting of the fall prevention bar (6) to the left and right arms (14) and (15) is performed by cross-sections of the left and right arm tip protrusions (14a) and (15a) so that the left and right arms (14) and (15) face each other in parallel. It is preferable to make the shape and the cross-sectional shape of the fitting hole of the fall prevention bar (6) mesh with each other and to make the left and right arms (14) and (15) parallel to each other so that there is no displacement.

  The fall prevention device with a seismic mechanism of the present invention is assembled in the structure as described above, and in order to make the seismic mechanism of the fall prevention device with the seismic mechanism stand by in an operable state, as shown in FIG. Left and right body plate arm locking grooves (12c) (13c) that continue several millimeters from the lower end of the left and right body plate guide grooves (12b) (13b) to the rear, and left and right arms attached to the left and right arms (14) and (15) When the guide dowels (14b) and (15b) are moved downward along the left and right main body plate guide grooves (12b) and (13b), the left and right arm guide dowels (14b) and (15b) are applied by the urging force of the pull spring (8). Is pulled in and fixed in the left and right body plate arm lock grooves (12c) (13c), the seismic mechanism is in an operable standby state, and at the same time, it is possible to work without trouble in and out of the articles on the shelf. Front of Unitanaban (1) becomes disengaged state, viewing and articles on the shelf, nor disfiguring.

  When vibration such as an earthquake occurs, the weight (11) attached to the trunks of the left and right arms (14) (15) is placed on the shelf by the seismic mechanism of the fall prevention device with the seismic mechanism of the present invention. Left and right arm spring holes (attached to the back of the left and right arms (14) and (15)) when sliding forward on the trunk of the left and right arms (14) and (15) due to the swinging of the upper article in the front-rear direction. 14c) (15c) and the left and right arms (14) (15) hit the left and right arm weights (14e) and (15e) attached to the abdominal surface of the left and right arms (14) and (15e). (12c) (13c) deviates and returns into the left and right main body plate guide grooves (12b) (13b), and at the moment, the left and right main body plate guide grooves (12b) (13b) by the biasing force of the pulling spring (8) Along As shown in FIG. 10, the fall prevention bar (6) fitted to the left and right arms (14) and (15) moves to the front position of the article on the shelf, and enters the fall prevention operation state. Articles on the shelf are prevented from falling by the fall prevention bar (6).

  The seismic mechanism of the fall prevention device with a seismic mechanism according to the present invention is a pendulum type like the conventional seismic mechanism, and prevents it from resonating with a swing and not operating in synchronization. As shown in FIG. 2, the left and right arms (14) and (15) are in a standby state with the trunks of the left and right arms being in a horizontal state, and the attached weight (11) reacts only to the shaking in the front-rear direction in which the article on the shelf jumps out. (14) Sliding on the body of (15), the weight of the weight (11) is attached to the back of the left and right arms (14) (15), and left and right arm spring hooks (14c) (15c) and left and right arms ( 14) It is used to push the left and right arms (14) and (15) forward against the left and right arm weights (14e) and (15e) attached to the abdominal surface of (15). Can be operated accurately.

In the above, even when vibration such as an earthquake continues for a long time, when the article on the shelf moves forward and pushes the fall prevention bar (6) forward as shown in FIG. (14) The fulcrum supporting (15) is one place, and the fall prevention bar (6) swings in the vertical rotation direction around the left and right arm end holes (14d ') (15d'), and the article on the shelf is moved. When the support position was changed and lowered, there was a risk of falling out of balance when the article on the shelf was pushed forward. Accordingly, the left and right main body plate guide grooves (12b) and (13b) have upper left and right main body plate guide grooves (12b) and (13b), and the left and right main body plate guide grooves (12d) (13d) On the other hand, left and right body plate rotation support boxes (12e) and (13e) are provided below the left and right body plates (12) and (13), and the left and right arm arm end holes (14d ′) and (15d ′) are provided. By providing a space that allows the inserted rotating dowel (7) to be displaced back and forth in the left and right body plate rotation support box (12e) (13e), the left and right arms (14) and (15) are shifted back and forth. Left and right arm guide dowels (1) attached to the left and right arms (14) and (15) in the left and right body plate pull-in grooves (12d) and (13d), respectively. 4b) (15b) is retracted, and the left and right arms (14) (15) and the fall prevention bar (6) are always horizontally positioned forward and at the same height of the article on the shelf without shifting up and down. And more reliably prevent items from falling on the shelf.

As described above, the left and right body plate guide grooves (12b) and (13b), the left and right body plate arm lock grooves (12c) and (13c) provided in the left and right body plates (12 and 13), and the left and right body plate retracting grooves (12d). The movements of the left and right arms (14) (15) and the fall prevention bar (6) can be controlled by (13d), and the seismic mechanism can be controlled by simply attaching a pair of weights (11). In order to control the movement of the left and right arms (14) and (15) and the fall prevention bar (6) and to attach the seismic mechanism, many parts are required. The left and right main body plates (12) and (13) and the weight (11) can be omitted, and switching between the fall-preventing operation state and the release state can be realized more reliably and at low cost.
In order to carry out the present invention more reliably, it is desirable that the detachable shelf board (1) is installed in a state of being fixed to the stacking shelf main body in advance.

  The technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in this specification or the drawings achieves a plurality of objects at the same time, and attaining one of the objects itself has technical utility.

  It can be used in bookcases, store display fixtures, warehouse stock shelves, etc.

1 shelf plate 2 left body plate 2a left body plate slit hole 2a 'left body plate slit wide hole 2b left body plate guide groove 2b' left body plate groove wall cutout hole 2c left body plate arm lock groove 2d left body plate pull-in groove 2e Left body plate rotation support BOX
2e 'Left body plate rotation support BOX slit hole 2f Left body plate notch hole 2g Left body plate spring hook hole 3 Right body plate 3a Right body plate slit hole 3a' Right body plate slit wide hole 3b Right body plate guide groove 3b ' Right body plate groove wall cutout hole 3c Right body plate arm lock groove 3d Right body plate retracting groove 3e Right body plate rotation support BOX
3e 'Right body plate rotation support BOX slit hole 3f Right body plate notch hole 3g Right body plate spring hanging hole 4 Left arm 4a Left arm tip protrusion 4b Left arm guide dowel 4c Left arm spring hanging hole 4d Left arm end 4d' Left arm End hole 5 Right arm 5a Right arm tip protrusion 5b Right arm guide dowel 5c Right arm spring hook hole 5d Right arm end 5d 'Right arm end hole 6 Fall prevention bar 7 Rotating dowel 8 Pull spring 9 Left and right side plates 10 of loading rack Back plate 11 Weight 11a Weight hole 12 Left main body plate 12a Left main body plate slit hole 12a 'Left main body plate slit wide hole 12b Left main body plate guide groove 12b' Left main body plate groove wall cutout hole 12c Left main body plate arm lock groove 12d Left Body plate pull-in groove 12e Left body Rate rotation support BOX
12e 'Left body plate rotation support BOX slit hole 12f Left body plate notch hole 12g Left body plate spring hook hole 13 Right body plate 13a Right body plate slit hole 13a' Right body plate slit wide hole 13b Right body plate guide groove 13b ' Right body plate groove wall cutout hole 13c Right body plate arm lock groove 13d Right body plate retracting groove 13e Right body plate rotation support BOX
13e 'right body plate rotation support BOX slit hole 13f right body plate notch hole 13g right body plate spring hook hole 14 left arm 14a left arm tip protrusion 14b left arm guide dowel 14c left arm spring hook hole 14d left arm end 14d' left arm End hole 14e 15 per left arm weight Right arm 15a Right arm tip protrusion 15b Right arm guide dowel 15c Right arm spring hook hole 15d Right arm end 15d 'Right arm end hole 15e Per left arm weight

Claims (3)

A fall prevention device equipped with a fall prevention bar used for a loading shelf,
The left and right body plates are provided with left and right body plate guide grooves, left and right body plate arm lock grooves that continue to the bottom of the left and right body plate guide grooves, and left and right body plate retraction grooves that continue to the top of the left and right body plate guide grooves.
Left and right arm guide dowels are attached to the left and right arms that support the fall prevention bar, and the left and right arm guide dowels are fitted into the left and right body plate arm lock grooves,
The right and left body plates guide grooves and left and right body plate guide groove followed left body plates arm lock grooves and the lateral body plate pull along the groove, the movement of the left and right arms guide dowels attached to the right and left arm supporting the fall prevention bar Is controlled,
By the urging force of the engagement with the attached to left and right body plate spring hook and right arm spring hook which is attached to the left and right arm to the right and left body plates sealed pull spring, maintaining the fall prevention bar in front of the articles on the shelf and wherein, fall prevention device. A left and right body plate rotation support box is provided at the lower rear part of the left and right body plates, and the rotating dowels that are the fulcrums of the left and right arms move within the left and right body plate rotation support box , and the lower ends of the left and right body plate guide grooves are The left and right main body plate arm lock grooves formed on the front and further upward in the shape are provided, and the left and right arm guide dowels attached to the left and right arms supporting the fall prevention bar when the article is put in and out It fits into the lock groove and keeps it in front of the shelf, and the left and right main body plate guide grooves with the upper ends of the left and right main body plate guide grooves formed in the front shape are provided. The left and right arm guide dowels attached to the left and right arms that support the fall prevention bar when the To get stuck, preventing the deviation of the heave in the該落under prevention bar downward due to vibration, characterized in, drop protection device according to claim 1. Left and right body plate arm lock grooves formed rearward at the lower part of the left and right body plate guide grooves, and left and right body plate lead-in grooves formed forward at the upper part of the left and right body plate guide grooves are provided,
A weight is attached to the body of the left and right arms that support the fall prevention bar, and the weight moves forward along the body of the arm during vibration, pushing the left and right arms forward, into the left and right body plate arm lock grooves. the was fixed maintains lateral arm guide dowel to release the sustain removed from the right and left body plates arm lock groove, characterized by being equipped with a seismic mechanism for pushing up the front of the article on top of the shelves, claim anti-drop device according to 1.

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