JP3019139U - Fall prevention jig for stepladder - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a fall prevention jig for stepladder which can more effectively prevent fall of the stepladder. [Structure] A connecting member 2 is horizontally mounted between the lower parts of two pedestals 1a.
The connecting member 2 can be fixed to the pedestal 1a by the plate members 3 and U bolts that are fixed to both ends of the connecting member 2. One ends of the L-shaped outriggers 7 are coaxially and slidably inserted into the tubular bodies 2a at both ends of the connecting member 2. The outrigger 7 is composed of a rod body 8 inserted into the pipe body 2 a and a support column 9 extending downward from the rod body 8. The rod body 8 and the tube body 2a are implemented by inserting the pin 10 into the pin hole.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fall prevention jig for a stepladder which is a jig for preventing the stepladder from falling and is effective at a construction site where the installation location is not always horizontal.

[0002]

[Prior art]

 Conventional jigs for preventing the stepladder from falling are described, for example, in Japanese Utility Model Publication No. 6-35597 (referred to as the first conventional example) and Japanese Utility Model Publication No. 6-35600 (referred to as the second conventional example). There is something. In the jig of the first conventional example, a metal tubular body is used as a jig body, a holder capable of holding a stepladder is provided at one end of the jig body, and a metal is provided at the other end of the jig body. The rod-shaped body is coaxially inserted. A hook is provided at the tip of the metal rod. Then, the holder is made to grasp the step of the stepladder and the hook is hooked on the wall rebar or the like to stand upright to prevent the stepladder from falling.

Further, in the jig of the second conventional example, a metal tube is used as a jig body, and a holder capable of gripping a pedestal of a stepladder is provided at one end of the jig body. The other end side of the jig body is bent into an L shape, and a disc body including a suction cup or the like is provided at the tip thereof. Then, the holder is gripped by the lower part of the pedestal of the stepladder, and the board at the other end is grounded on the floor or the ground. This is done individually for all four stanchions of the stepladder.

[0004]

[Problems to be solved by the device]

 However, in the jig of the first conventional example, a member such as a wall rebar having a predetermined strength is erected upright near the stepladder installation position. Further, of the wobble of the pedestal, wobble in the axial direction of the jig body may be suppressed, but since the jig body and the stanchion are fixed at one point, the jig is Note that it cannot resist the force in the direction deviated from the axial direction of the jig body so much and is not effective for the wobble of the stepladder in the direction deviated from the axial direction of the jig body.

Further, when the floor or the like on which the stepladder is installed is uneven, the posture of the stepladder may be inclined and unstable even if the jig is attached. Further, even in the jig of the second conventional example, since only one place of the pedestal is grasped, the force in the direction deviated from the axial direction of the jig main body is not so much resisted, and the deviated direction is not resisted. There is a problem that it is not effective for the wobble of the stepladder.

Furthermore, with this jig structure, it is difficult to provide the gripped pedestal with rigidity enough to float and support it, and if the pedestal is floated, the stepladder becomes unstable. As a result, even if the above jig is attached to each pedestal, the main member that supports the load of the stepladder is still the pedestal pedestal, and the supporting span of the stepladder does not spread. Also, since the pedestal cannot be floated even if the jig is attached as described above, if the floor etc. on which the stepladder is installed are uneven, the posture of the stepladder will not be stable even if the jig is attached. There is a risk of becoming.

The present invention has been made in view of the above problems, and an object thereof is to provide a fall prevention jig for stepladder which can more effectively prevent fall of the stepladder.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the stepping prevention jig for stepladder of the present invention is provided with a connecting portion which is horizontally mounted between two opposing pedestals of the stepladder and fixed to the pedestal, and the opposing pedestal. And a pair of columns extending downward from the connecting portion on the outer side.

Further, the invention described in claim 2 is different from the structure described in claim 1 in that the two pedestals are provided with a pair of fixing fittings for detachably fixing the connecting portions. Is characterized by. Further, the invention described in claim 3 is different from the structure described in claim 2, in that the fixing metal fitting has a U-bolt and a bolt hole into which a threaded portion of the U-bolt can be inserted and which is connected. And a plate member fixed to the section.

In addition, the invention described in claim 4 is different from the structure described in any one of claims 1 to 3 in that the position is located inside the connection position with each of the columns and only in the lateral direction. It is characterized in that it is provided with a telescopic mechanism that can expand and contract. Further, the invention described in claim 5 is different from the structure described in claim 4, in that the extension mechanism includes a tubular body disposed on the stepladder side and having its axis oriented in a lateral direction, and the tubular body. It is characterized in that it comprises a rod body that is coaxially and slidably inserted and is connected to the support column.

Further, in the invention described in claim 6, in contrast to the configuration described in claim 5, the tube body and the rod body of the connecting portion each have one pin hole into which a pin can be inserted or It is characterized by multiple openings arranged side by side in the axial direction. Further, in the invention described in claim 7, in addition to the configuration described in any one of claims 1 to 6, each of the columns has a length adjusting mechanism capable of adjusting the length thereof. Is characterized by.

[0012]

[Action]

 In the device according to the first aspect of the present invention, since the two columns are laterally suspended between the two columns that are separated by a predetermined distance, the connecting portion is fixed to the stepladder at two points separated by the predetermined distance. As a result, each fixed portion of the stepladder and the jig does not wobble like in the conventional case, and a predetermined strength is secured in the fixed portion.

Therefore, it is possible to float the two pedestals to which the jig is attached, and instead of the pedestals, the pair of columns can support the stepladder. As a result, the supporting span of the stepladder on the side of the two pillars becomes large. Further, in the invention according to claim 2, since the connecting portion can be removably fixed to the pedestal, the fixing position of the jig to each pedestal is shifted to support the fixed pedestal side. The height can be changed. Further, since it is detachable, the jig can be diverted to another stepladder.

For example, when the device according to the third aspect is adopted, the pedestal is tightly connected by the U bolt and the plate member, and the connecting portion is detachably fixed to the pedestal. Further, in the invention described in claim 4, it is possible to adjust the amount of extension of each support column from the stepladder, that is, the size of the support span, by the expansion and contraction mechanism. For example, if the device according to the fifth aspect is adopted, the position of the column connected to the rod side approaches or separates from the pedestal by changing the insertion amount of the rod body into the tubular body.

Further, in the invention described in claim 6, by inserting the pin so as to connect the pin hole of the tube body and the pin hole of the rod body, the movement of the rod body in the axial direction is restricted. . Further, in the invention described in claim 7, the height of each column can be adjusted by changing the height of each column individually according to the partial unevenness at the stepladder installation position.

[0016]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. First, the structure will be described. As shown in FIG. 1 when the stepladder is viewed from the front, a connecting member 2 forming a part of the connecting portion can be laterally mounted between two lower parts of the pedestal 1a of the stepladder 1 facing each other. Has become. The connecting member 2 is composed of a square pipe, and both ends thereof form a tube body 2a with its axis oriented in the lateral direction.

Further, plate members 3 that can abut the pedestal 1 a of the stepladder 1 are fixed to the outer surfaces of both ends of the tie member 2, respectively. Two bolt holes 4 into which the shaft portions of U bolts can be inserted are formed in the upper and lower portions of the plate member 3, respectively. The U bolt is omitted in FIG. Further, in this embodiment, the fixing member is constituted by the plate member 3, the U bolt, and the nut that can be screwed into the threaded portion of the U bolt.

Further, pin holes 5 through which a pin can pass in the radial direction are vertically opposed and opened at positions inside the fixing position of the plate member 3 on the connecting member 2, respectively. . Further, one end side of an outrigger 7 made of a square pipe is coaxially and slidably inserted into the tube body 2a at both ends of the connecting member 2. The outrigger 7 is formed in an L-shape, and is composed of a rod body 8 inserted into the pipe body 2a with its axis oriented in the lateral direction as described above, and a column 9 extending downward from the rod body 8. It is configured. A rubber member 13 is attached to the lower end of the support column 9. Thus, by adjusting the insertion amount of the rod body 8 into the tubular body 2a, the support column 9 can approach and separate from the pedestal 1a from the position indicated by the alternate long and short dash line to the position indicated by the solid line in FIG. . As a result, the tube 2a and the rod 8 constitute a telescopic mechanism. The rod body 8 constitutes a part of the connecting portion.

Further, two sets of pin holes 6 are opened in the rod body 8 side by side in the axial direction. As shown in FIG. 1, one pin hole is coaxial with the pin hole 5 opened in the tube body 2a when the support column 9 is separated from the pedestal 1a, and the other pin hole 6 is the support column. It is set so as to be coaxial with the pin hole 5 opened in the tubular body 2a when 9 is brought close to the stanchion 1a to the position indicated by the alternate long and short dash line. In FIG. 1, the one pin hole opened in the rod body 8 and the pin hole 5 of the tube body 2a are coaxially overlapped.

Two pins 10 are fixed to the connecting member 2 via a chain (not shown). Next, the attachment of the above-mentioned stepping prevention jig for stepladder to the stepladder 1 will be described. First, as shown in FIG. 1, the tie member 2 is bridged between two pedestals 1a facing each other, and each plate member 3 is brought into contact with the pedestal 1a. Although FIG. 1 shows the stepladder 1 in a standing state, the jig may be attached with the stepladder 1 lying down.

Next, as shown in an enlarged view of FIG. 1 viewed from the A side, the screw portions 11a of the two U bolts 11 are inserted into the bolt holes 4 of the plate member 3, and the U bolts 11 and the plate member are inserted. The pedestal 1 a is sandwiched by 3, and the nuts 12 are screwed into the threaded portions 11 a to temporarily fix the connecting member 2 to the stepladder 1. Next, the rod body 8 is inserted into the tubular body 2a of the connecting member 2, and the pin holes 5 of both 2a and 2a are coaxially aligned and the pin 10 is inserted. As a result, the support column 9 is fixed to the connecting member 2 via the rod 8.

Next, after adjusting the position of the plate member 3 with respect to the pillar 1a, the nut 12 is fully tightened. As a result, the span of the pedestal 1a on the side where the jig is attached is increased, and the stepladder 1 is less likely to tip over. At this time, the side on which the jig is attached can be adjusted in height by adjusting the attachment position of the tie member 2 to the pedestal 1a up and down. By providing the step ladder, the posture of the stepladder 1 can be prevented from tilting, and the stepladder 1 can be prevented from tipping over.

In addition, when moving the stepladder 1 with the jig attached, the pin 10 is once pulled out, the pillar 9 is brought close to the pillar 1a, and then the pin 10 is inserted to fix the pillar 9. To bunch. This prevents the columns 9 from overhanging and also prevents the columns 9 from coming out of the tie 2 even when the stepladder 1 is tilted. Although the connecting member 2 is detachable from the pedestal 1a in the above-described embodiment, the connecting member 2 may be directly fixed to the support column 9 to omit the plate member 3 as the fixing metal fitting and the U bolt 11. Good.

Further, in the above-described embodiment, the expansion and contraction mechanism is provided so that the position of the support pillar 9 can be moved. However, the square pipe forming the connecting member 2 and the square pipe forming the pipe body 2 a and the support pillar 9 are integrated. It may be constituted by a book pipe. However, in this case, the span between the columns 9 is constant. Further, in the above embodiment, the pillar 9 and the rod body 8 are each formed of a hollow pipe in order to reduce the weight, but the pillar 9 and the rod body 8 may be formed of a solid steel frame or the like. Good.

Further, in the above embodiment, only two sets of pin holes 6 are provided in the rod body 8, but three or more sets are provided so that the distance between the support column 9 and the pedestal 1a can be adjusted in multiple stages. May be. Further, in the above embodiment, a square pipe is provided as the connecting member 2, but the connecting member 2 may be made of a plate material, for example. In this case, for example, the plate member is laterally bridged between two opposing pedestals 1a, and the plate member also serves as the pair of plate members 3, and the shafts are respectively positioned at the left and right end portions thereof. Attach a tube made of square pipe or the like oriented in the direction.

The plate member 3 has a flat plate shape, and the surface contacting the pedestal 1a is formed into a shape along the outer surface of the pedestal 1a so that the pedestal 1a and the plate member 3 are The contact area with 3 may be increased. By doing so, the jig is more firmly fixed to the pedestal 1a. Further, in the above-mentioned embodiment, the connecting member 2 is fixed to the pedestal 1a by tightly connecting the pedestal 1a with the U-bolt 11 and the plate member 3. However, as the fixing metal fitting, a conventional jig is used. It is also possible to employ other known tightening fittings such as a holder, and fix the connecting portion to the pedestal 1a by the tightening metal fittings.

Further, a length adjusting mechanism may be provided between the lower end of the column 9 and the rubber member 13 as shown in FIG. This length adjusting mechanism is configured such that a screw member 14 is erected from a rubber member 13 and a member 16 having a female screw 15 that can be screwed into the threaded portion 11a is fixed in the lower end portion of the support column 9, The length of the entire column 9 is adjusted by rotating the member 13 in the forward and reverse directions to adjust the screwed state.

In this way, the length of the support column 9 is adjusted according to the partial unevenness formed on the floor, and it is possible to prevent only one support column 9 from floating, and the stepladder 1 is stabilized. It Note that the length adjusting mechanism is not limited to the above configuration, and other known length adjusting mechanism may be adopted, such as providing the above mechanism in the middle of the column 9.

[0029]

[Effect of device]

 As explained above, in the fall prevention jig for stepladder of the present invention, the supporting span of the stepladder becomes large, and the stability of the stepladder is improved. In addition, the increase in the span of support for the stepladder prevents the stepladder from tilting its posture compared to the conventional one, even if the floor on which the stepladder is placed is uneven. Further, since the pedestal on the side where the jig is installed can be floated, it is possible to positively prevent the inclination of the stepladder posture by installing the jig on the lower side where the stepladder is placed. It is even more advantageous for preventing the stepladder from falling.

At this time, by adopting the invention described in claim 2 or 3, it is possible to adjust the amount by which the pedestal to which the jig is attached floats from the floor. Therefore, by adjusting the height of the stepladder on the side where the jig is provided according to the unevenness of the floor, it becomes easy to correct the inclination of the posture of the stepladder, and to prevent the stepladder from falling over. Be advantageous. Also, by adopting the invention described in claim 4 or 5, it is possible to adjust the support span on the side where the jig is attached, and adjust the support span according to the narrowness of the place where the stepladder is installed. Alternatively, the lower end of the column can be adjusted to a stable position, which is advantageous for preventing the stepladder from falling.

At this time, if the invention of claim 6 is adopted, the position of the support pillar can be restricted only by inserting the pin into the pin hole, and when using the stepladder to which the jig is attached or when moving the stepladder. At this time, the columns are prevented from falling out of the pipe body. Further, when the invention described in claim 7 is adopted, the length of each column can be finely adjusted. As a result, even if there is some unevenness or the like on the floor where the lower end of the pillar is in contact with the ground, the pillar can be floated or the stepladder can be tilted, which is also useful for preventing the stepladder from falling.

[Brief description of drawings]

FIG. 1 is a view showing a fall prevention jig for stepladder according to an embodiment of the present invention.

FIG. 2 is an enlarged view seen from the arrow A side in FIG.

FIG. 3 is a cross-sectional view showing a lower end position of a column.

[Explanation of symbols]

 1 Stepladder 2 Connecting Material 2a Tube Body 3 Plate Member 5, 6 Pin Hole 8 Bar Body 9 Support 10 Pin 11 U Bolt

Claims (7)

[Scope of utility model registration request] 1. A connecting portion that is laterally bridged between two opposing pedestals of a stepladder and fixed to the pedestal; A fall prevention jig for a stepladder, comprising: a pillar. 2. The stepping prevention jig for stepladder according to claim 1, further comprising a pair of fixing fittings for detachably fixing the connecting portions to the two columns. 3. The fixing fitting comprises a U bolt and a plate member having a bolt hole into which a threaded portion of the U bolt can be inserted and which is fixed to the connecting portion. The fall prevention jig for stepladder described in 2. 4. The expansion / contraction mechanism capable of expanding / contracting only in the lateral direction is provided at a position inside the connection position with each of the columns in the connecting portion, and the expansion / contraction mechanism is provided. Fall prevention jig for stepladder. 5. The expansion / contraction mechanism includes a tubular body disposed on the stepladder side and having its axis oriented in the lateral direction, and a rod body coaxially and slidably inserted into the tubular body and coupled to the column. The fall prevention jig for stepladder according to claim 4, wherein: 6. The pipe body and the rod body of the connecting portion each have one or a plurality of pin holes into which pins can be inserted and which are arranged side by side in the axial direction thereof. Fall prevention jig for stepladder. 7. The stepping prevention device for stepladder according to claim 1, wherein each of the columns has a length adjusting mechanism capable of adjusting the length thereof.