JPH0316876Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to a clamp suitable for conveying articles having standardized dimensions, and in particular to concrete clamps having a U-shaped cross section for road gutters.
This invention relates to a clamp suitable for transporting articles standardized in a plurality of different sizes, such as blocks, concrete blocks for lid plates placed above the blocks, concrete blocks for road curbs, etc.

When laying road gutters, first dig the earth and sand at the location where they will be laid, stretch the scribing thread, then place U-shaped blocks mass-produced at the factory in line with the scribing thread, leaving gaps between the joints, and then cement. It is common to seal the joints with. These blocks have several standards regarding groove width, length, wall thickness, etc., and their weight also varies.
They vary from 20Kg to over 200Kg.

Conventionally, when placing such a U-shaped block at the installation position, the opposing side walls were held between two or more ice clamps and transported by two or more people. To avoid the clamp holding one side wall from coming into contact with the scoring thread when aligning the block with the scoring thread, place it away from the scoring thread and move the U-shaped block manually. It was necessary to align it with the scribing thread. This reduces work efficiency at the site and requires a great deal of labor. In addition, when transporting concrete blocks for lid plates and curbstones with the conventional clamps used for U-shaped blocks, they must be held with their surfaces vertical, so it is difficult to transport them close to the installation location. Afterwards, they had to be replaced manually. The present invention aims to provide a clamp that significantly improves such work. Furthermore, the present invention provides a lightweight clamp with fewer parts.

The clamp according to the present invention includes: an elongated support extending in the horizontal direction; a pair of lifting arms; a pair of gripping members; and a pair of link arms connecting the lifting arms and the gripping members. and a link mechanism that interlocks the pair of lifting arms.

The pair of gripping members have an L-shaped side profile, are pivotally connected to both ends of the support at their respective bent portions, and extend toward the center of the support from their respective pivot points. a grip having a linking end and a gripping portion extending downwardly from a respective pivot point, each of said gripping ends having a thickness that is less than the predetermined spacing in the stationary array of objects to be gripped; A board is set up.

The pair of lifting arms are pivotally connected to the support body at their respective intermediate portions inside the pivot joint between the gripping member and the support body, and extend from the respective pivot points toward both ends of the support body. The extending lifting end portion and the link connecting end portion extending from each pivot point toward the center of the support body and extending in a point-symmetrical position with respect to the midpoint of the line segment connecting each pivot point. have

One end of each of the pair of link arms is pivotally connected to the pair of lifting arms in proximity to the lifting end of the lifting arm;
The other end of each of the pair of link arms is pivotally connected to a respective link coupling end of an adjacent gripping member.

The link mechanism includes a link arm whose both ends are pivotally connected to the link connecting ends of the pair of lifting arms.

The present invention will be described in further detail with reference to the accompanying drawings, which illustrate specific examples of the present invention.

Fig. 1 is a side view showing one embodiment of the clamp according to the present invention, Fig. 2 is a partial plan view thereof, and Fig. 3 is a partial plan view of the lifting arm and lifting part. . In this embodiment, the support body 10 consists of a pair of elongated plate-like bodies 11 and 11' extending horizontally and placed side by side and spaced apart from each other. A pair of plate-like bodies 1
1 and 11' are formed with a pair of bearing holes 14, 14', 15, and 15' corresponding to each other, respectively, for pivotally supporting one of the pair of gripping members 12 and 13 in the longitudinal direction. A pair of bearing holes 18, 18', 19, 19' for pivotally connecting one of the pair of lifting arms 16, 17, respectively, at two pivot points spaced apart from each other close to the center of the It is formed.

In this embodiment, the pair of lifting arms extending from the pivot point in the direction of both ends are elongated arms, and are arranged close to and above both sides of the support body 10 in the longitudinal direction. Lifting parts 20 and 21 are provided on the free end side. Bearing holes 22 and 23 are formed in corresponding ends of the support body 10, which are arranged close to the center of the support body 10, and the pair of bearing holes 18, 18', 19,
19' by bolts 24 and 25.
Further, pin receiving holes 26, 27 are formed on the free end side, and the gripping members 12, 13 are connected to each other by a pair of link arms 30, 30', 31, 31' which are opposed to each other via pivot pins 28, 29. Further, pin receiving holes 32 and 33 are formed at the corresponding ends inside the respective pivot points at points symmetrical with respect to the midpoint P of the line segment connecting the pivot points. A pair of link arms 36 via mounting pins 34 and 35,
said arm 16 by means of linkage consisting of 36';
17 are connected.

The pair of gripping members 12, 13 are fixed to one end of the pair of plates 37, 37', 38, 38', respectively,
On this fixed part side, there are a pair of bearing holes 39, 39',
40, 40' are formed, and the pair of plate-like bodies 11,
A pair of bearing holes 14, 14' formed in 11',
15, 15' with bolts 41, 42,
Below this pivot joint, there are grip plates 4 that extend downward, respectively.
3, 44, and a pair of pin receiving holes 45, 45', 46,
46' is formed and connected to the respective lifting arms by the link arms 30, 30', 31, 31' via pivot pins 47, 48.
The gripping plates 43, 44 are enlarged at their ends as wide gripping surfaces extending in a direction perpendicular to the plane in which they rotate with respect to the support 10, the width W of which is larger than that of the U-shaped block gripped by this clamp. The joint width can be easily set by making the thickness d equal to the maximum distance between the outer surfaces of the opposing side walls and slightly thinner than the joint width between adjacent U-shaped blocks.

Although the lifting parts 20 and 21 are shown as handles suitable for manual lifting, mechanical lifting is performed above the attachment parts of the lifting parts 20 and 21 of the lifting arms 16 and 17. Holes 49, 50 are formed for the shackle device, and a handle and a hole are provided for dual use.

In addition, a lifting part 20 is provided in the middle part of the support body 10,
21 is provided with a hanging ring 51 for releasing the gripping members 12, 13 upwards.

In this embodiment, the above embodiment can be provided with various adjustment means in order to convey articles of different dimensions in the same clamp.

In this embodiment, bearing holes 39 and 40 for a pair of gripping members at both ends in the longitudinal direction of the support;
By making the distance between 39' and 40' adjustable (for example, by forming in advance a plurality of pairs of bearing holes with different distances between the bearing holes in the support)
It can accommodate relatively small changes in the length of the gripped part,
Furthermore, in the specific example shown in FIGS. 1 and 2, a link arm 36, which connects the inner ends of the pair of lifting arms,
By making the length of 36' adjustable (for example, by providing multiple pivot holes in the link arm or by providing link arms of different lengths), it is possible to accommodate relatively large changes in the length of the gripped object. can be accommodated. Furthermore, in both embodiments, the pivot point between the lifting arm and the gripping member can be adjusted (the lifting arm is provided with a plurality of pivot holes in advance).
It can accommodate relatively small changes in the length of the object to be grasped.

Since the clamp of the present invention is constructed as described above, when transporting an object to be gripped (for example, a U-shaped block), the clamp is first positioned in the direction of the groove of the block, and the free ends of the pair of lifting arms are lifted up. The upper ends of both side walls are sandwiched at one end of the block in the groove direction. At this time, the pair of lifting arms are interlocked by the link means connecting them, and the gripping member is interlocked in response to the movement of these arms by the link arm connected to the gripping member on the free end side. As a result, an equal clamping force is generated at both ends of the object to be held, and there is no fear that the object will fall from the clamp due to movement of one of the pair of arms.

Next, when placing it at the target position, since it can be gripped as described above, the U-shaped block can be placed directly with approximately constant stitch spacing without the clamp coming into contact with the scribing thread. . Furthermore, after placement, in order to release the clamp from the object to be grasped, the lifting arm can be lowered in the opposite direction from the lifting operation, but when the hand is released from the lifting part, the arm returns to its original unloaded state due to its own weight. It descends and automatically releases from the grasped object. At this time, the gripping member moves in the same manner as the lifting operation, and at the same time separates from the object to be gripped, allowing the object to be installed while maintaining the horizontal state. Alternatively, the holding member may be opened by lifting the hanging ring upward without using this lifting arm. When carrying the clamp of the present invention to the original operating position, by using this hanging ring, it can be carried in its working state (horizontal state), and moreover, it can be carried in that state to the next object to be grasped. It can be installed and transport work can be started immediately. Similarly, gutter cover plates and curb stones can be transported with their surfaces horizontal, so they can be placed directly at the desired location.

Although the present invention has been described above through examples, the present invention is not limited to the examples, and various modifications can be made without departing from the technical idea of the present invention. For example, the number of supports, lifting arms, link arms, and gripping members does not necessarily have to be arranged in pairs, and they can be formed from a single plate.

Effects The effects achieved by the present invention are as follows.

(1) The load on the clamp components is reduced by the gripping member,
Concentrate on the link arm and the area near the pivot point of the lifting arm to the link arm,
Therefore, a large load is not placed on other components or other regions of the component article, and the weight of these components or regions of the article can be reduced.

(2) A link mechanism that synchronizes the operation of a pair of lifting arms connects the link connecting end of the lifting arms to
By arranging the support body and the lifting arm at points symmetrical positions with respect to the pivot point, and forming the link connection end of the lifting arm by a single link arm. , the link mechanism for synchronizing the lifting arm can be made lighter with fewer parts.

(3) By interlocking the lifting arm and the gripping member, it avoids falling accidents caused by conventional ice clamp type clamps, and it can be placed directly at the target location while being transported, resulting in safe and efficient work. It has a number of practical effects that can be expected.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the position of the clamp of the present invention, FIG. 2 is a partial plan view thereof, and FIG. 3 is a partial plan view of a lifting arm and a lifting portion. Explanation of symbols, 10, 60: Support, 16, 1
7: Lifting arm, 24, 25, 41, 42: Bolt, 28, 29, 34, 35, 47, 48: Pivot pin, 30, 30', 31, 31', 36, 3
6': Link arm.

Claims (1)

[Claims for Utility Model Registration] An elongated support extending in the horizontal direction, a pair of lifting arms, a pair of gripping members, and a pair of link arms connecting the lifting arms and the gripping members. and a link mechanism that interlocks the pair of lifting arms, wherein the pair of gripping members have an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and each of the gripping members has an L-shaped side profile, and the respective bent portions are attached to both ends of the support body. a link coupling end that is pivotally connected and extends toward the center of the support from each pivot point; a gripping end that extends downwardly from the respective pivoting point; and a gripping plate having a thickness smaller than a predetermined spacing in a stationary array of articles to be gripped, and each of the pair of lifting arms has an intermediate portion between the gripping member and the support. The lifting ends are respectively pivotally connected to the support body inside the pivot points, and the lifting ends extend from the respective pivot points toward both ends of the support body, and the lifting ends extend from the respective pivot points toward the center of the support body. and a link connecting end extending in a point symmetrical position with respect to the midpoint of the line segment connecting the respective pivot points, and one end of each of the pair of link arms is connected to the lifting member. It is pivotally connected to the above-mentioned pair of lifting arms in proximity to the lifting end of the arm, and the above-mentioned 1.
The other end of each of the pair of link arms is pivotally connected to the link joint ends of the adjacent gripping members, and the link mechanism has both ends connected to the link joint ends of the pair of lifting arms. A clamp suitable for conveying articles having standardized dimensions, characterized in that: is a pivotally connected link arm.