KR19980033201A - Folding ladder hinge - Google Patents

Abstract

The present invention relates to a hinge for a folding ladder, and more particularly, to a hinge of a folding ladder that can be used by opening a pair of ladders hinged to open the angle of the ladder 40, 105 and 180 degrees when deployed. .

To this end, the present invention is composed of a rotation disk 30 and the left and right rotation disk 30 and the central rotation disk 20, the support connectors 134, 234, 124, 224 are each formed integrally, bent at both ends The book central portion is formed to be concave and connected to the inclined curved portions 325 and 335 so that the ends of the ladder's eye beams can be inserted in the support connectors 124 and 224 and 134 and 234. The parts are joined by riveting in the coupling fixtures 124 ', 224' (134 ', 234'), and the rivet balls 326, 326 '(336) and 336' are disposed at both ends of the shoulders. In addition, the paper holding unit 10 is connected to the paper plate 11 with a tape-like spring 13 and the paper holding shaft 13, the locking unit 140 is a locking protrusion 142 at the left and right ends of the paper handle (141) ( 142 'is formed, and the through hole 144 is formed in the hanging handle 141, whereby the ends of the blotter shaft 13 are coupled to each other by riveting to facilitate folding. Shirai assembled a handy effect.

Description

Folding ladder hinge

The present invention relates to a hinge for a folding ladder, and more particularly, to a hinge of a folding ladder that can be used by opening a pair of ladders hinged to open the angle of the ladder 40, 105 and 180 degrees when deployed. .

For folding a conventional ladder, it is already known from Utility Model Registration Application No. 93-17614.

1, 2, and 3, the prior art is an exploded perspective view of the hinge for the conventional ladder, Figure 2 is an exploded perspective view of the left and right rotating disc of the conventional hinge for the ladder, The operation relationship of the ladder hinge for the prior art is shown.

When the prior art is described in detail, it is easy to use because it is free to rotate by forming the rotating disk 20, 30, the paper pressing portion 10 and the hanging portion 40 so that it can be easily used when folding or folding the ladder. And as the coupling force is strong and easy to adjust, the rotating disc is composed of a left and right rotating disc 30 and the central rotating disc 20, the rotary disc 30 is the base of the ladder can be coupled to the lower end An appropriate gap portion is formed by two left and right rotating discs 31 and 31 'which are integrally opposed to each other on an upper end integrally with the supporting connector 34 and 34' formed with a connector.

In the disc, the primary groove 32 and the secondary groove 35, which are accommodating portions (holes) of the rubbing protrusions (fixing pins), are integrally formed on the left and right sides, and a central hole 35 is formed in the center of the bushing. (44) is fitted, the central rotary disk 20 forms the central left and right rotary disks 21 and 21 'integrally with the support connectors 24 and 24', and the central hole 23 is disposed at the center thereof. And the shaft hole 22 and the shaft hole 25 are disposed around the paper sheet, and the paper sheet 10 is connected to the paper plate 11 by the paper sheet shaft 13, and the spring 12 is fastened and fixed. And the ruler portion 40 is a ruler protrusion 42, 42 'is formed at the left and right ends of the ruler handle 41, the ruler protrusions 45, the ruler projection 46, 46' is formed on the ruler protrusion. 45 'is protruded, and is comprised by the pin 43 connected to the paper-making axis 13 of the paper-pressure part.

2 shows the left and right rotating discs, FIG. 2A shows the left rotating disc, FIG. 2B shows the right rotating disc, and FIG. 2C shows a cross-sectional view taken along the line A-A of FIG. 2A.

Reference numeral 51 denotes a shaft hole into which the rubbing protrusion is fitted, and 52 is a fixing groove of the spring 12.

Therefore, looking at the effect of the present invention, Figure 3 of the accompanying drawings is a cross-sectional view showing a central incision from the initial step (a) of the ruler and the rotating disc of the ladder to the fixed step (d), a The ruler is a state diagram that is coupled to the rotating disc, b is a state diagram where the ruler is pulled out of the rotating disc and spans the upper disc, c is a state diagram showing the groove of the upper disc pushing the ruler, d Is a state diagram that is coupled when the ruler is pushed by the upper disc and the holes of the upper and lower discs coincide.

The conventional invention as described above is the primary groove 32 that is the receiving portion (hole) of the rubbing protrusion (fixing pin) formed by the elasticity of the spring 12, the rubbing portion 41 is formed on the left and right sides of the disc when the pressing portion 10 is pressed. It is inserted into the secondary chief groove 35 (b in FIG. 3), and then contacted with the shaft hole 25 of the central rotating disc 20 by the subsequent rotation and rotated together with it (c in FIG. 3) and In addition, when the entire shaft hole coincides with the spring 12, the guide protrusions (fixing pins) 42 and 42 'formed to be taped to the upper and lower narrow belts of the guide portion 40 are easily fitted (FIG. 3). d) is fastened without shaking the ladder.

However, the conventional ladder as described above is provided with a means for fixing, but because the hole of the rubbing protrusion is formed wide, when the load is applied to the ladder, the hole portion is formed of a thin steel plate, the deformation easily occurs. In addition, the end of the spring is in the U-shaped shape during assembly work to prevent the separation, but the assembly process is inconvenient because the force is given by the elasticity of the spring.

In addition, since the end of the ladder pillar is sharply formed, it sometimes hurts the worker when assembling, inserting the blotter shaft into the knob, and aligning the rivet holes formed in each line in a straight line. Because it is inserted and riveted, the riveting work is cumbersome, and the twist spring is forcibly rotated by 90 degrees to assemble the wrist, resulting in wrist injuries due to the tension of the spring. Since there is a play between the pressure plate and the rotating disc, if the spring is detached, the rotational force of the spring is lost and there is a problem in that it does not function properly.

The present invention has been made to solve the above-mentioned drawbacks, to provide a hinge of a folding ladder that is easy to fold, easy to assemble during operation, and easy to operate with a small force The purpose is.

1 is an exploded perspective view of a hinge for a conventional folding ladder.

2 is a cross-sectional view of a rotating disc of a hinge for a conventional folding ladder,

2 (a) is a cross-sectional view of the left rotating disc,

2 (b) is a cross-sectional view of the right rotating disc,

(C) is sectional drawing of the A-A line | wire of (a).

3 is a cross-sectional view showing the working relationship of the hinge for a conventional ladder, from the initial stage (a) of the ruler and the rotating disc of the ladder to the final stage (d) fixed,

Figure 3 (a) is a state diagram that the ruler is coupled to the rotating disc

3 (b) is a state diagram in which the ruler is pulled out of the rotating disk and over the upper disk,

3 (c) is a state diagram showing a state in which the groove of the upper disc pushes the ruler;

Figure 3 (d) is a state in which the ruler is coupled when the holes of the upper disc is matched by being pushed on the upper disc

Figure 4 is an exploded perspective view of the hinge for folding ladder of the present invention

5 is a cross-sectional view of the rotating disc of the hinge for folding ladder of the present invention,

5 (a) is a cross-sectional view of the left rotating disc,

5 (b) is a cross-sectional view of the right rotating disc,

6 is a cross-sectional view of the paper holding portion (button) and the hanging portion (fixed knob) of the hinge for folding ladder of the present invention,

6 (a) is a cross-sectional view of the pressure plate and the pressure axis;

Fig. 6 (b) is a side sectional view seen from the direction of the arrow on the pusher shaft,

6 (c) is a cross-sectional view of the hanging portion (fixed knob),

6 (d) is a bottom view of the hanging portion (fixed knob),

6 (e) is a cross-sectional view of a ruler protrusion (fixing pin) of the ruler portion (fixing knob),

6 (f) is a cross-sectional view showing the shape of the spring of the present invention.

7 is a cross-sectional view showing the working relationship of the hinge for the folding ladder of the present invention, from the initial stage (a) of the ruler and the rotating disc of the ladder to the final stage (d) fixed,

Figure 7 (a) is a state diagram that the ruler is coupled to the rotating disc

7 (b) is a state diagram in which the ruler is pulled out of the rotating disc and spans the upper disc.

7 (c) is a state diagram showing a state in which the groove of the upper disc pushes the ruler;

Figure 7 (d) is a state diagram that is coupled when the ruler is pushed by the upper disk and the holes of the upper and lower disks match.

Figure 8 is a use state diagram of the folding ladder hinge of the present invention combined with the i-beam.

* Description of the symbols for the main parts of the drawings *

10: pressure part 20: central rotating disc

30: left and right rotating disc 40: hanging earth

44: bushing 142: hanging protrusion

145: hanging ruler 146: hanging ruler

152: spring fixing groove

In order to achieve the above object, it will be described in more detail according to the accompanying drawings, preferred embodiments of the present invention.

Figure 4 is an exploded perspective view of the hinge for the folding ladder of the present invention, Figure 5 is a cross-sectional view of the rotary disk of the hinge for the ladder ladder of the present invention, Figure 5 (a) is a cross-sectional view of the left rotating disk, Figure 5 ( b) is a cross-sectional view of the right rotating disc.

FIG. 6 is a cross-sectional view of a paper pressing part (button) and a hanging part (fixed knob) of the hinge for a folding ladder of the present invention, and FIG. 6 (a) is a cross-sectional view of the paper plate and the paper pressing shaft, and FIG. Fig. 6 (c) is a sectional view of the hanging part (fixed knob), Fig. 6 (d) is a bottom view of the hanging part (fixed knob), and Fig. 6 (e) is Fig. 6 (f) is a cross sectional view showing the shape of the spring of the present invention.

In the present embodiment, the same configuration as the prior art is used with the same name and the same reference numerals, and description thereof will be omitted.

One embodiment of the present invention to realize the above object, as shown in Figure 4, when describing the technique of the present invention in detail, which can be easily used when the ladder is folded or folded rotating plate 20, 30 By forming the pressure-sensitive portion 10 and the hanging portion 140 of the) is free to rotate is easy to use, strong bonding force and easy to adjust.

The rotating disk is composed of a left and right rotating disk 30 and the central rotating disk 20, the rotating disk 30 forms a support connector 134, 234 to the eye beam 400 of the ladder can be coupled to the lower end. However, the rivet balls 336 and 336 'are disposed at both ends of the shoulder portion, and the coupling fixtures 134' and 234 'coupled to the eye beams of the ladder are laid at the bottom thereof, and the rivet balls 334 and 334' are disposed. The support connector 134 and the coupling fixture 134 ′ are connected to the inclined curved portion 335.

In addition, the two left and right rotating discs 31 and 31 ′ which are integrally opposed to the support connectors 134 and 134 ′ at the top thereof form an appropriate gap portion to fit the central rotating disc 20.

Similarly, the disc is integrally formed with grooves 132, which are accommodating portions (holes) of the rubbing protrusions (fixing pins), and a central hole 33 is formed at the center thereof, and the bushing 44 is fitted.

The central rotating disk 20 forms support connectors 124 and 224 in the central left and right rotating disks 21 and 21 ', and the rivet balls 326 and 326' are disposed at both ends of the shoulder. As the coupling fixtures 124 'and 224' coupled to the eye beam 400 of the ladder are laid at the bottom, the rivet balls 324 are formed, and the center hole 23 is disposed in the center thereof, and the shaft hole 22 is formed around the ladder. ) And the shaft hole 25 are disposed.

In addition, the support connector 124 and the coupling fixture 124 ′ is connected to the inclined curved portion 325.

In addition, the pressure-sensitive portion 10 is connected to the pressure plate (11) by the pressure-axis (13), the tape-like spring 12 is formed by the C-shaped binding ring 112 is fixed and fixed.

And, the ruler portion 140 is a ruler protrusion 142, 142 'is formed at the left and right ends of the ruler handle 141, the ruler protrusion 146 (146') is formed on the ruler protrusions 145) (145 ') is protruded in a hemispherical shape, the through hole 144 is formed where the end of the blotting shaft 13 is riveted, and is connected to the blotting shaft 13 of the blotting portion by rivets Consists of.

5 shows the left and right rotating disks 30, FIG. 5A shows the left (back) rotating disk 31, and FIG. 5B shows the right (front) rotating disk 31 '.

In FIG. 5 (a), the left rotation disc 31 has a shaft hole 51 into which a ruler protrusion is fitted, and a support connector 234 to which an eye beam of a ladder can be coupled to a lower end thereof.

In addition, the rivet ball 336 'is disposed at both ends of the shoulder portion, and a coupling fixture coupled to the eye beam of the ladder is disposed at the bottom thereof to form rivet balls, and the support connector 234 and the coupling fixture 234' are formed. It is connected to the inclined curved portion 335 '.

In addition, the two left and right rotating discs 31 and 31 ′ facing each other on the upper end integrally with the support connector form an appropriate gap portion to fit the central rotating disc 20.

In particular, the fixing groove 152 of the spring to the subject of the present invention is formed in a long hole to facilitate the insertion of the U-shaped spring, the fixing groove 152 of the spring 12 is a central hole ( 33) is formed at the top.

In FIG. 5 (b), the right rotating disc 31 ′ is integrally formed with grooves 132, which are accommodating portions (holes) of the rubbing protrusions (fixing pins), on the left and right sides to minimize deformation of the rotating disc. The center hole 33 is formed in the center so that the bushing 44 is fitted.

In addition, a support connector 134 to which the eye beam of the ladder can be coupled is formed at the lower end thereof.

In addition, the rivet ball 336 is disposed at both ends of the shoulder portion, and a coupling fixture coupled to the eye beam of the ladder is disposed at the bottom thereof to form rivet balls, and the support connector 134 and the coupling fixture 134 'are light. It is connected to the photo curved portion 335.

In addition, the two left and right rotating discs 31 and 31 ′ facing each other on the upper end integrally with the support connector form an appropriate gap portion to fit the central rotating disc 20.

In addition, the support connector 134, 134 'which is the subject of the present invention, as shown in Figure 4, the aluminum bar as a part of the hinge leg to remove the edge (edge) formed at the end of the ladder pillar It is wrapped around.

That is, the support connector is integrally formed, but bent at the left and right ends so that the central portion is formed to be concave and connected to the inclined curved portion 335 so that the ends of the eye beams of the ladder are supported by the connector (124, 224) (134, 234). The central portion of the i-beam is configured to be riveted and coupled in the coupling fixtures 124 ', 224', 134 ', 234'.

FIG. 6 is a cross-sectional view of the holding part (button) and the holding part (fixing knob) of the hinge for a folding ladder of the present invention, which is a cross-sectional view of the pressing plate and the pressing axis of FIG. 6 (a) and the pressing axis of FIG. 6 (b). As shown in the side cross-sectional view seen in the direction of the arrow, the pressure plate 11 is formed with a pressing axis fixing groove 153, the pressing axis 13 is pressed, one end of the spring can be fitted. The spring fixing groove 151 is formed to be.

In addition, an end 121 is formed at the other end of the pressing axis 13, and a rivet hole 120 is formed at the center thereof so as to be riveted in the through hole 144 of the handle 141 to be described later.

6 (c) is a cross-sectional view of the hanging portion (fixing knob), the bottom portion of the hanging portion (fixing knob) of FIG. 6 (d) and the hanging protrusion (fixing pin) of the hanging portion (fixing knob) of FIG. 6 (e). As shown in the cross-sectional view, the ruler portion 140 is attached to the ruler protrusions 146 and 146 'on left and right sides, and a through hole 141 into which the end portion 121 of the pusher shaft 13 is fitted at the center portion thereof. In the left and right ends of the through hole 144, stepped 147 and 147 'are formed to enable riveting at this portion.

In addition, the ruler portion of FIG. 6 (e) consists of two right and left sides, and the ruler bar protrusion 145 having the ruler jaw 146 is protruded in a semicircular shape, and one side 135 of the circular groove of the right rotating disc 31 'is formed. It is configured to take on.

Figure 6 (f) is a cross-sectional view showing the shape of the spring of the present invention, it is configured in a tape shape, one end of the end 102 to be coupled to the spring fixing groove 151 of the pressure plate (11). The other end forms a C-shaped binding ring 112 so that the other end may be bound to the left rotating disc 31.

In addition, the tape spring itself is formed so as to avoid mutual interference.

In other words, when the pressing unit is pressed, the adhesive area of the spring becomes thick enough to form a plane.

Therefore, when the force is applied to the holding portion 10, the narrowly formed portion is pushed into the spring of the wide portion, so that the spring is automatically rotated (tension) without forcing the turning of the holding portion 10. The force is generated and caught by one side 135 of the circular groove 132 of the right rotating disc 31 '.

Accordingly, the operator can turn the hinge of the ladder as desired.

Referring to the overall working relationship of this invention, as follows.

7 of the accompanying drawings is a cross-sectional view showing a central incision from the initial stage (a) of the ruler and the rotating disc of the ladder to the fixed step (d), a is a state diagram in which the ruler is coupled to the rotating disc B is a state diagram where the ruler is pushed out of the rotating disc and spans the upper disc, c is a state diagram showing the state of pushing the ruler to the groove of the upper disc, and d is the upper and lower discs by which the ruler is pushed on the upper disc. This is a state diagram that is coupled when the holes of are matched.

Figure 8 is a use state diagram of the folding ladder hinge of the present invention combined with the i-beam.

Such the present invention is the receiving portion (hole) of the rubbing protrusion (fixing pin) formed on the left and right sides of the disc 141 by the elasticity of the spring (12) itself formed in a tape shape when pressing the paper holding portion (10). It is fitted into one side 135 of the groove 132 (b of FIG. 7), abutted by the shaft hole 25 of the central rotating disc 20 by the subsequent rotation and rotated integrally with it (c of FIG. 7). In addition, when the entire shaft hole coincides with the spring protrusion 12, the ruler protrusions (fixing pins) 142 and 142 'formed to be taped to the upper and lower straits of the ruler portion 140 are easily fitted (FIG. 7). D) is fixed without shaking the ladder.

If you want to release it after pressing the holding paper 10, the receiving portion (hole) of the ruled protrusion (fixing pin) formed on the left and right sides of the disc 141 by the elasticity of the spring 12 itself formed in a tape shape Inserted into one side 135 of the in groove 132 (b of Fig. 7), and then placed in the desired angle by the rotation after it to turn the handle 141 in the opposite direction, The protrusions 146 and 146 'are inserted into the shaft holes 25 so that the hinge of the ladder is fixed.

According to the present invention as described above, even when the hole is formed of a thin iron plate when the load is applied to the ladder by narrowly forming the hole of the ruler protrusion of the rotating disc, deformation does not easily occur, and spring end even during assembly work. It is easy to work because it can be easily combined with the U shape.

In addition, since the end of the ladder pillar is sharply removed, it does not injure the worker during assembly, and it forms a through hole in the knob so that it is riveted from the outside rather than the side. Not only is the riveting work easy, but also the requirement of the rivet is eliminated, which reduces the production cost. Also, the twist spring is taped to be assembled by automatically rotating it by 90 degrees. In the spring fixing hole formed in the rotating disc and the holding part, there is a gap between the pressing plate and the rotating disc, so that even if the spring is detached, the rotational force of the spring may be lost, thereby preventing the function from being performed. It works.

Claims (2)

Rotating disk 20, 30 and the paper holding portion 10 and the hanging portion 140 is formed, the rotating disk is composed of the left and right rotating disk 20 and the central rotating disk 20, the rotating disk 30 ) Is formed at the lower end of the support connector 134, 234 that can be coupled to the eye beam of the ladder, the central rotary disk 20 is the central left and right rotation disk 21, 21 'support connector 124 In the ladder hinge 124 'formed, the support connectors 134, 234, 124, and 224 are formed integrally with each other, but bent at both ends to form a central portion concave and beveled. 325) (335) to form the end of the eye beam of the ladder to be inserted into the support connector 124, 224 (134, 234), the central portion of the eye beam coupling fixtures (124 ', 224') 134 ', 234') are riveted and coupled, and the rivet holes 326, 326 ', 336, and 336' are disposed at both ends of the shoulder portion, and the blotter portion 10 is a paper plate 11 Tei on It is connected to the blotting shaft 13 together with the spring type, the ruler portion 140 is a ruler protrusion 142, 142 'is formed at the left and right ends of the ruler handle 141, the ruler portion handle 141 A through-hole 144 is formed, the hinge of the folding ladder, characterized in that the end of the tack axis (13) is coupled by riveting. According to claim 1, wherein the left rotating disc 31 is formed with a spring fixing groove 152 in the long hole, the tape-shaped spring 12 is formed to avoid mutual interference, the c-shaped binding ring at the end It is fixed to form (112), the circular disk 132 is integrally formed on the rotating discs (31, 31 ') in the same left and right sides, and the ruled jaw (146) on the ruled protrusions (142, 142'). 146 ') is a hinge for folding ladders, characterized in that the ruled protrusions 145 and 145' are formed in a semicircular shape.