JP3123697U - Feeding ladder - Google Patents

Abstract

Disclosed is a feeding ladder that is easy to assemble, has a solid structure, is reliable, and is safe to use.
SOLUTION: It is composed of a plurality of telescopic main column elements fitted with hollow tube bodies having different tube diameters, a connector, a tightening mechanism, a buffer, and a lateral scaffolding plate, and tightened when extended or contracted. The mechanism will not loosen or fall off. After coupling the connector and the main column element, the two were fixed with adhesive, and the tightening mechanism was covered with a horizontal scaffolding plate and covered, providing a feeding ladder with no fear of rusting and shortening the service life. .
[Selection] Figure 3A

Description

  The present invention relates to a feeding ladder, and more particularly to a feeding ladder that is easy to assemble, has a solid structure, is reliable, and is safe to use.

  Ladder is a tool that is indispensable for daily life and used for working at height and lifting goods.

  As shown in FIG. 1, an ordinary ladder 800 is formed by combining two ladders, each having a crossbar attached at regular intervals, between two main pillars standing on both sides in an A shape. Non-slip shoes are put on the legs of the main pillar, and a single flat plate is placed on the uppermost end to form a platform.

  Such a structure is large in size as a whole, is inconvenient to carry, occupies considerable space for storage, and is troublesome.

  In view of the above circumstances, the inventor of the present application has devised the delivery ladder of the present application based on many years of experience.

  One of the objects of the present invention is to provide a feeding ladder which is composed of a plurality of main pillar elements, a connector, a tightening mechanism, and a lateral scaffolding plate, and is extendable and convenient to carry, use and store. .

  Another object of the present invention is to provide a feeding ladder that has a further improved fastening mechanism and can be used safely and securely without being loosened or falling off during feeding or contraction.

  Another object of the present invention is to provide a feeding ladder in which, after the connector and the main column element are coupled, the two are fixed with an adhesive, and there is no risk of dropping off.

  Another object of the present invention is to provide a feeding ladder in which a tightening mechanism provided in a connector is covered with a horizontal scaffolding plate and covered so as not to be damaged by rust.

  In order to achieve the above-mentioned object, the present invention is a feeding ladder formed by connecting a large number of stretchable main pillar elements, which are formed by fitting hollow tubes having different tube diameters to each other. A plurality of main pillar elements; and a connector attached horizontally to an upper end of the main pillar element, including a tightening mechanism on the inside, and a connector covered with a lateral scaffold plate; and A chain rod having a first recess and a second recess formed at intervals on the rod body, which can be inserted horizontally into the hollow tube body; A cross arm of the activation key is fitted, a leg portion of the driven key is fitted in the second recess of the chain rod, and one end portion of the activation key and the driven key respectively protrudes on both sides When a pin is formed and the chain bar moves back and forth, the activation key and the follower key The driven plate is further provided at one end of the driven key, and when the chain rod is pulled out from the hollow tube, the driven plate rises upward, and the upper layer A feeding ladder characterized by opening a tightening mechanism by touching an activation key mounted inside the connector was provided.

  Other features, advantages, and applications of the feeding ladder according to the present invention will become apparent from the contents of the embodiments described in detail below with reference to the drawings attached to the specification.

  ADVANTAGE OF THE INVENTION According to this invention, the extending | stretching ladder which can be expanded-contracted comprised from several main pillar elements, a connector, a fastening mechanism, and a horizontal scaffolding board, and is easy to carry, use, and storage can be provided.

  The feeding ladder according to the present invention is a pin hole, a fixing pin, a restraining ring, etc. provided between the connector and the main column element, and can be assembled and fed efficiently, and adhesive is applied to the mucus flow path. By injecting, the whole mechanism is strengthened, light and easy to carry, safe to use, and can extend the service life.

  FIG. 2 shows a feeding ladder according to the present invention. The payout ladder 1 can be extended and contracted, and FIG. 3A shows the extended state. This ladder 1 has a plurality of main pillar elements 2, a connector 3, and a scaffolding plate 5 in the horizontal direction. The main pillar elements are extended and used (one layer at a time) upward. It is something to offer. In storage, main pillar elements having different tube diameters are inserted from the top to the bottom to reduce the size.

  Reference is made to FIGS. The main column elements 2 are fitted together. That is, the lower main pillar element 2 accommodates a small main pillar element 2a having a small tube diameter adjacent thereto. This hollow tubular main column element 2 has a pin hole 21 and a positioning hole 22 at the upper end, and has a piercing hole 23 at the lower stage, and protrudes outward one at an appropriate height at the upper end. Further, an inner annular groove 26 traveling toward the inside of the pipe is formed on the surface of the main column element 2 at an appropriate height corresponding to the stop ring 25 (FIG. 3B). reference).

  The connector 3 includes a tightening ring 31 and a shaft contact portion 32, and the tightening ring 31 is provided on the upper end of the main column element 2 by being screwed by screws 33 in the radial direction of the main column element 2. ing. Several pins 34 formed therein are fitted into the pin holes of the main column element 2 and fixed. A mucus flow path 35 is recessed in the inner wall, and an injection hole 36 is opened at one end of the flow path 35, and an adhesive or an adhesive is injected to be brought into close contact with the main column element 2. In addition, a through hole 30 is opened and communicates with a passage 37 positioned inside the axial contact portion 32.

  The shaft contact portion 32 and the clamping ring 31 are integrally formed and include two pieces of standing side plates 321 and 322 that are parallel to each other. The side plates 321 and 322 form a passage 37 at an appropriate interval and accommodate the tightening mechanism 4. In addition, one vertical groove 38 and two concave portions 391 and 392 are dug in the inner wall surfaces of the both standing side plates 321 and 322 at opposite positions, respectively. Among them, the vertical groove 38 is formed at a position adjacent to the end of the side plate, the first recess 391 is formed at the edge of the upper end surface of the side plate, and the second recess 392 is formed at the edge of the lower end surface of the side plate.

  The tightening mechanism 4 includes a first layer tightening mechanism 4a and an upper layer tightening mechanism 4b (all second and higher layer tightening mechanisms are referred to as an upper layer tightening mechanism 4b). For example, what is shown in FIG. 5 belongs to the upper layer tightening mechanism 4b, and includes one clasp 41, one chain bar 42, one spring 43, one activation key 44, and one driven key 45. It is out. The clasp 41 is provided with one upstanding fixing plate 410, which is inserted into the vertical groove 38 of the upright side plates 321 and 322 of the axial contact portion 32. One horizontal bottomed sleeve 413 is provided in the center of the fixing plate 410, and the opening thereof faces the through hole 30.

  The chain rod 42 is a horizontally disposed cylindrical rod body, one end of which passes through the through hole 30 and the positioning hole 22 of the main column element 2, and the other end is inserted into a horizontal sleeve 413. The In addition, there is a spring 43 between the sleeve 413 and when moving horizontally, the spring 43 can be used to return to its original position. In addition, concave portions (circular grooves here) 421 and 422 are formed at intervals on the rod body of the chain rod 42.

  The activation key 44 includes a first face plate 441 and a second face plate 442 that are connected in a substantially V shape, and a cross arm composed of two protrusions spaced apart from each other at the upper end of the first face plate 441. (Cross arm) 443 is provided, and the cross arm 443 is fitted in the recess 422 of the chain rod 42. Pins 444 protruding on both sides are formed at the connecting portions of the first and second face plates 441 and 442, and are inserted into the recesses 392 of the standing side plates 321 and 322 of the tightening ring 31. As a result, when the second face plate 442 of the activation key 44 is pushed up from below, the chain rod 42 is moved horizontally back and forth about the pin 444 as an axis.

  The driven key 45 is provided with one activating plate 451, and pins 452 projecting on both sides are formed at the lower end thereof, and are inserted into the recessed portions 391 of the standing side plates 321 and 322 of the tightening ring 31. At the lower end of the activating plate 451, there is a leg portion 453 that forms an angle of 90 degrees with the activating plate 451 and fits into the recess 421 of the chain rod 42. As a result, when the chain rod 42 moves back and forth horizontally, the driven key 45 rotates 90 degrees to bring the driving plate 451 up (upright).

  The upper layer tightening mechanism 4 b is incorporated in the shaft contact portion 32, and the lateral scaffold plate 5 is attached to the outside of the shaft contact portion 32. A through hole 51 is opened at the position of the second face plate 442 of the activation key 44 corresponding to the lower end surface portion of the scaffold plate 5, and a second through hole is opened at the position of the driven key 45 corresponding to the upper end surface portion. Thus, the activating plate 451 of the driven key 45 can be raised (upright) with its tip up.

  FIG. 4 shows a detailed structure of the first layer tightening mechanism 4a. A spring 43 similar to the upper layer tightening mechanism 4b is also attached to the first layer tightening mechanism 4a. The structure of the activation key 44 and the driven key 45 will not be described again. The difference in the arrangement will be described below.

  As shown in FIG. 4, the chain rod 42 of the first layer tightening mechanism 4a has recesses 421 and 422, and one narrow groove 423 is formed at one end to which the spring 43 is attached. A clip having a shape can be fitted, and a clamping portion 425 is formed at the other end. Instead of this, a fixing plate 46 having a through hole 461 is installed at the center of the clasp 41 of the upper layer tightening mechanism 4b. The fixing plate 46 is fitted and fixed in the vertical groove 38 of the upright side plates 321 and 322 of the shaft contact portion 32.

  There is one manual control button 47 and one connecting rod 48. There is one guide plate 471 at the upper end of the manual control button 47, and a horizontal concave groove 472 is formed at the lower end of the guide plate 471. The guide plate 471 is pushed into the guide hole 53 of the lateral scaffolding plate 5, The manual control button 47 can freely slide back and forth along the side edge of the guide hole 53 via the horizontal groove 472.

  In addition, a concave portion (tank passage) 473 is formed at the center of the manual control button 47, and is connected to one end of the connecting rod 48 by a pin. The connecting rod 48 is disposed sideways, and the front end of the connecting rod 48 passes through the through hole 461 of the fixing plate 46 and is connected to the holding portion 425 of the chain rod 42 with a pin. The other end of the connecting rod 48 is the sideways scaffolding plate 5. The guide hole 53 and the recessed portion 473 of the manual control button 47 are inclined and assembled integrally with the manual control button 47.

  Further, a buffer 6 is attached to the lower end of the hollow main pillar element 2, and the sleeve-like buffer 6, which is somewhat conical (conical), has a hook 61 on the outside at the upper end. The outer periphery of the lower end portion of the main column element is coupled with the collar hole 24 of the main column element, and is attached with a collar 62 which is rich in elasticity. When the main column element 2 is pulled upward, the collar 62 does not resist, and the main column element 2 can be easily pulled out, but when it is lowered, the radial direction is directed outward as the cone-shaped collar 62 is inclined. Because it receives the pressure of, it descends slowly. A porous membrane with pores is formed on the surface of the buffer 6, and as the buffer 6 moves up and down, air is introduced from the pores into the cavity chamber of the membrane to perform a buffering action.

  As shown in the drawing, the vertical movement is mitigated by the frictional force between the upper and lower main column elements 2 by the action of the buffer 6 attached to the bottom of the main column element 2 and the elastic collar 62. . In addition, noise during the expansion / contraction operation of the ladder is reduced. A mucus flow path 35 is formed in the connector 3, and an adhesive is injected to wait for solidification, and the upper end of the main column element 2 and the connector 3 are firmly coupled. Therefore, the structure of the completed ladder is totally safe and robust. Since the tightening mechanism 4 is completely covered and covered with the connector 3 and the lateral scaffolding plate 5, the possibility of damage due to intrusion of rust and external objects is low.

  When the inner main column element 2a and the outer main column element 2 are separated from each other, the former outer convex stop ring 25 and the latter inner convex annular groove 26 are in contact with each other, and the upper and lower main column elements 2a, 2 are The movement is restricted and fixed at a predetermined position (see FIG. 3B). Also, the piercing hole 23 at the lower end of the main column element 2a in the inner layer, the positioning hole 22 in the main column element 2 in the outer layer, and the through hole 30 in the connector exactly match the path of the chain rod 42. The chain bar 42 is advanced and inserted and fixed.

  7 and 8 show the operation status of the feeding ladder 1 according to the present invention. When the manual control button 47 of the first layer tightening mechanism 4 is moved to the center of the scaffold plate 5 and the chain bar 42 is separated from the positioning hole 22 of the main column element 2 by the connecting bar 48, the chain bar 42 is moved. The activation key 44 rotates clockwise, the driven key 45 rotates counterclockwise, and the activation plate 451 of the driven key 45 rises up from the second through hole 52 of the scaffold plate 5.

  After the trigger plate 451 rises up, the second face plate 442a of the trigger key 44a in the second layer scaffold plate 5a is pushed through the through hole 51a of the second layer scaffold plate 5a, and the trigger key is pressed. 44a is rotated clockwise. As a result, the chain rod 42a in the second-layer scaffolding plate 5a is released from the positioning hole 22a in the second-layer main column element 2a and is opened (open), and the second-layer main column element 2a. Is pulled up, the pierced hole 23a and the through hole 30 of the main pillar element 2 of the first layer are aligned, and the chain rod 42a borrows the elasticity of the spring 43a and the main pillar element 2a of the second layer The main pillar element 2a of the second layer is fixed through the piercing hole 23a.

  When the chain bar 42a is detached from the positioning hole 22a in the main pillar element 2a of the second layer, the driven key 45a in the scaffolding plate 5a of the second layer also rotates counterclockwise along with this movement, The moving plate 451a is raised up. Such a procedure is repeated to operate the tightening mechanism located above the third layer to open (release) the feeding ladder 1.

  Before the chain bar 42 is closed in its original position and the trigger plate 451 of the follower key 45 is not yet completely horizontal, the trigger plate 451 is not yet fixed, but even if it is stepped on by mistake. Even if an external force is applied, the tightening mechanism 4 does not open, but the chain rod 42 is pushed further into the main column element 2 and the tightening state is further strengthened. This is a superb safety function that the present invention exhibits.

  The feeding ladder according to the present invention can be efficiently assembled and fed by the pin hole 21, the fixing pin 34, the restraining ring 25, etc. provided between the connector 3 and the main column element 2, and the mucus flow By injecting an adhesive or adhesive into the road 35, the entire mechanism is strengthened, light and easy to carry, safe to use, and can be used for a long time.

  The present invention is not only creative in its form, but can add many functions as described above compared to the conventional ladder, and it fully meets the legal and utility model registration requirements for novelty and inventive step. is there.

  The above detailed description is a specific description of an embodiment in which the present invention can be implemented. However, this embodiment does not limit the scope of the request for registration of the utility model of the present invention, and all implementations or changes of the equivalent effect made without departing from the technical spirit of the present invention are all about the utility model of the present invention. It shall be included within the scope of the registration request.

It is a three-dimensional view of a conventional ladder. It is the top view which showed the state which the delivery ladder concerning this invention contracted. It is the top view which showed the state which the delivery ladder concerning this invention developed. It is an enlarged view of the A part of FIG. 3A. It is a disassembled perspective view of the main pillar element of the 1st layer of the supply ladder which concerns on this invention, and a lateral scaffold board. It is a disassembled perspective view of the main pillar element more than the 2nd layer of the delivery ladder which concerns on this invention, and a horizontal scaffolding board. It is a perspective view of the assembly of the main pillar element of the supply ladder concerning this invention, and a lateral scaffold board. It is sectional drawing of the assembly of the main pillar element of the delivery ladder which concerns on this invention, and a scaffolding board of a horizontal direction. It is sectional drawing of embodiment of this invention.

Explanation of symbols

1 Feeding ladder,
2 main pillar elements,
3 connector,
4 Tightening mechanism,
5 Scaffolding plates in the horizontal direction,
2a Main pillar element of inner layer,
21 pin holes,
22 positioning holes,
22a positioning hole,
23 Piercing hole,
23a Puncture hole,
24
25 Stop ring,
26 inner convex annular groove,
30 through holes,
31 Tightening ring,
32 axial contact,
33 screws,
34 Pin for fixing,
35 Mucus flow path,
36 injection hole,
37 passage,
38 vertical grooves,
321, 322 Standing side plate,
391, 392 recess,
4a Tightening mechanism of the first layer,
4b Upper layer tightening mechanism,
41 Stopper,
42 chain stick,
43 Spring,
44 Activation key,
45, 45a Followed key,
451 motor plate,
46 fixing plate,
47 Manual control button,
48 connecting rods,
410 fixing plate,
413 horizontal sleeve,
421, 422 recess,
423 narrow groove,
424 C-shaped clip,
425 clamping part,
441 first face plate,
442 second face plate,
443 Cross arm,
444 pins,
44a, 44b Activation key,
442a Second face plate,
451 motor plate,
452 pins,
453 legs,
461 through holes,
471 guide plate,
472 horizontal ditch,
473 recess,
51 through holes,
52 second hole,
53 guide holes,
5a Second layer lateral scaffold plate,
51a through-hole,
5b 3rd layer lateral scaffolding board,
6 buffers,
61 hook,
62 Elastic collar.

Claims (13)

A feeding ladder formed by connecting a number of telescopic main pillar elements,
A plurality of telescopic main pillar elements formed by fitting hollow tubes having different tube diameters;
The main pillar element is horizontally attached to the upper end, includes a tightening mechanism inside, and has a connector covered with a lateral scaffolding plate,
The tightening mechanism has a chain bar that is capable of being inserted horizontally into the hollow tube body and has a first recess and a second recess formed on the bar at intervals,
A cross arm of the activation key is fitted in the first recess of the chain rod, and a leg portion of the driven key is fitted in the second recess of the chain rod,
Pins protruding on both sides are formed at one end portions of the activation key and the driven key, respectively, and when the chain rod moves back and forth, the activation key and the driven key rotate about the pin,
Further provided on one end of the driven key is a driving plate, and when the chain rod is pulled out of the hollow tube, the driving plate rises upward and is located inside the upper layer of the connector. A feeding ladder characterized by opening a tightening mechanism by touching an attached activation key.   The feeding ladder according to claim 1, wherein one end of a chain rod of a tightening mechanism attached to the inside of the first layer connector is connected to a manual control button that moves in a lateral direction by a connecting rod.   A guide plate having a horizontal groove at the lower end is attached to the upper end of the manual control button, and the groove is inserted along the edge of a guide hole formed in the scaffold plate. The feeding ladder according to claim 2, wherein a control button can be moved horizontally at a lower end of the scaffolding plate.   A C-shaped clip is inserted into a groove formed near the connecting portion between the chain rod of the tightening mechanism and the connecting rod, and a spring is installed in contact with an end surface of the C-shaped clip. The other end is in contact with an upright fixing plate installed inside the connector, and the chain rod is moved and released, and then returns to the original closed position by the elasticity of the spring. The feeding ladder according to claim 2, wherein the feeding ladder is urged in a direction of moving. The tightening mechanism attached to the inside of the connector installed in the layer above the first layer has a stopper attached to the one end side of the chain rod in a state of being inserted into the connector,
The clasp includes an upright fixing plate, and a bottomed sleeve is horizontally penetrated at the center of the fixing plate, and a spring and a chain rod are inserted into the opening of the sleeve. The feeding ladder according to claim 1.   The main column element and the connector are positioned by inserting the pins of the main column element into the pin holes of the connector, and further injecting adhesive material or adhesive into the mucus flow path formed inside the connector. The feeding ladder according to claim 1, wherein the feeding ladder is fixed.   The chain rod of the tightening mechanism provided inside the connector can move back and forth at a position where each hole provided in the adjacent main column element is in communication with the through hole of the connector. The feeding ladder according to claim 1.   The feeding ladder according to claim 1, wherein the connector includes a tightening ring connected to the main pillar element and a shaft contact portion in which the tightening mechanism is installed.   The feeding ladder according to claim 8, wherein the axial contact portion of the connector includes two side plates formed integrally with the clamping ring and parallel to each other.   The two side plates of the axial contact portion of the connector are each formed with one vertical groove and two concave portions at opposite positions on the inner wall surface, and the vertical groove is formed at a position adjacent to the end of the side plate. 10. The payout according to claim 9, wherein a stopper plate or a stopper is inserted in the vertical groove, and the pin of the driven key and the trigger key are fitted in the two recesses, respectively. ladder.   A sleeve-shaped buffer is further provided at the lower end of the main column element, and the outer periphery of the lower end of the buffer is surrounded by an elastic collar so that the inside of the hollow tube of the adjacent main column element is 2. The feeding ladder according to claim 1, wherein the feeding ladder has a buffering effect that increases a contact friction force with the blade and reduces a noise during the expansion and contraction operation of the ladder.   12. A buffer film having pores is formed in the buffer, and air is introduced from the pores into a cavity in the glue film as the buffer moves up and down to perform a buffering action. The feeding ladder described in 1.   The lower part of the main pillar element is provided with an outer convex stop ring protruding outward, and the upper part is formed with an inner convex annular groove projecting inward of the main pillar element. When the elements are separated from each other, the upper and lower main pillar elements are fixed by bringing the outer convex blocking ring of the main pillar element in the inner layer and the inner convex annular groove of the main pillar element in the outer layer into contact with each other. The feeding ladder according to claim 1.

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