Spreader, arm and auxiliary part

Abstract

The present invention provides a spreader, arms, and auxiliary equipment that can effectively prevent vertical and lateral slippage during the widening operation of a pair of arms. [Solution] A spreader 10 equipped with a pair of arms 30 and 40, used to spread an object, is provided with an anti-slip portion 50 on the outside of at least one of the arms 30 and 40, the anti-slip portion 50 having a first wave-shaped portion 52 extending along the longitudinal direction of the arms 30 and 40, and a second wave-shaped portion 54 arranged in parallel with the first wave-shaped portion 52, the phase of the first wave-shaped portion 52 and the phase of the second wave-shaped portion 54 are offset.

Description

Technical Field

[0001] The present disclosure relates to a spreader, an arm, and an accessory.

Background Art

[0002] Conventionally, as a rescue device (rescue apparatus) for pushing open the doors of an accident vehicle or the gaps in structures at the rescue site, a portable spreader having a pair of arms that open and close by rotating relative to a base has been used. As such a spreader, for example, those disclosed in Patent Document 1 and the like have been conventionally known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As shown in FIG. 3 of Patent Document 1 and the like, at the tip of the arm of the spreader, in order to securely grip the object and prevent slipping, unevenness (anti-slip) in a wave shape (zigzag shape) is provided. However, in the conventional arm, the unevenness is formed in a single pattern, and there is a problem that it does not always exhibit sufficient performance against the complex-directional forces received by the arm during the widening operation, particularly slipping in the lateral direction.

[0005] The present disclosure has been made in consideration of such points, and an object thereof is to provide a spreader, an arm, and an accessory that can effectively prevent longitudinal and lateral slipping during the widening operation of a pair of arms.

Means for Solving the Problems

[0006] The spreader of the present disclosure is A spreader having a pair of arms, used for spreading an object, An anti-slip portion is provided on at least one outer side of the aforementioned arm. The anti-slip portion has a first wave-shaped portion extending along the longitudinal direction of the arm and a second wave-shaped portion arranged in parallel with the first wave-shaped portion. The phase of the first wave shape portion and the phase of the second wave shape portion are out of sync.

[0007] In the spreader of this disclosure, The recess in the first wave-shaped portion and the convex portion in the second wave-shaped portion may be positioned at substantially the same location in the longitudinal direction of the arm.

[0008] In the spreader of this disclosure, The first wave-shaped portion and the second wave-shaped portion may each be formed by continuous arc-shaped irregularities.

[0009] In the spreader of this disclosure, The anti-slip portion may be made of metal.

[0010] In the spreader of this disclosure, The anti-slip portion may be configured as an auxiliary device that can be attached to and detached from the main body of the arm.

[0011] The arm disclosed herein is An arm of a spreader used to spread an object, The outside of the aforementioned arm is provided with an anti-slip part. The anti-slip portion has a first wave-shaped portion extending along the longitudinal direction of the arm and a second wave-shaped portion arranged in parallel with the first wave-shaped portion. The phase of the first wave shape portion and the phase of the second wave shape portion are out of sync.

[0012] The auxiliary device of this disclosure is An accessory that is detachably attached to the arm of a spreader used to push and expand an object, The accessory has a first wave-shaped portion extending along the longitudinal direction of the arm and a second wave-shaped portion arranged parallel to the first wave-shaped portion, The phase of the first wave-shaped portion and the phase of the second wave-shaped portion are shifted.

Advantages of the Invention

[0013] According to the spreader, arm, and accessory of the present disclosure, longitudinal and lateral slipping during the widening operation of the pair of arms can be effectively prevented.

Brief Description of the Drawings

[0014] [Figure 1] It is a perspective view showing the configuration of the spreader according to the present embodiment. [Figure 2] It is a top view of the arm in the spreader shown in FIG. 1. [Figure 3] It is a side view of the arm shown in FIG. 2. [Figure 4] It is a perspective view showing another configuration of the spreader according to the present embodiment.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIGS. 1 to 3 are diagrams showing the configuration of a spreader 10 according to the present embodiment and a pair of arms 30, 40 of this spreader 10.

[0016] First, the configuration of the spreader 10 according to this embodiment will be described with reference to FIG. 1. As shown in FIG. 1, the spreader 10 includes a cylindrical main body 20 in which a hydraulic pump 22 is incorporated, a base 24 provided at the tip of the main body 20, and a pair of arms 30 and 40 respectively attached to the base 24. Here, the first arm 30 is rotatable with respect to the base 24 about the axis 26. Also, the second arm 40 is rotatable with respect to the base 24 about the axis 28. The first arm 30 and the second arm 40 are each made of a metal such as iron or aluminum, for example.

[0017] A piston member (not shown) is provided inside the base 24. This piston member is adapted to reciprocate along the longitudinal direction of the spreader 10 when pressure oil is sent from the hydraulic pump 22 incorporated in the main body 20. Also, a first connecting member (not shown) and a second connecting member (not shown) are respectively connected to the tip of the piston member. The first connecting member is rotatable with respect to the piston member about a first axis (not shown). Also, this first connecting member is rotatable with respect to the first arm 30 about a second axis (not shown). Thus, when the piston member reciprocates, the first connecting member is pulled or pushed out from the main body 20 side by the piston member, so that the first arm 30 rotates with respect to the base 24 about the axis 26.

[0018] Also, the second connecting member is rotatable with respect to the piston member about a third axis (not shown). Also, this second connecting member is rotatable with respect to the second arm 40 about a fourth axis (not shown). Thus, when the piston member reciprocates, the second connecting member is pulled or pushed out from the main body 20 side by the piston member, so that the second arm 40 rotates with respect to the base 24 about the axis 28.

[0019] As shown in Figures 1 to 3, anti-slip portions 50 are provided near the tips on the outer surfaces of the first arm 30 and the second arm 40. These anti-slip portions 50 are formed as part of the first arm 30 and the second arm 40. For this reason, the anti-slip portions 50 are made of a metal such as iron or aluminum. The anti-slip portions 50 have a first wave-shaped portion 52 that extends along the longitudinal direction of the first arm 30 and the second arm 40, and a second wave-shaped portion 54 that is arranged in parallel with the first wave-shaped portion 52. Here, the first wave-shaped portion 52 and the second wave-shaped portion 54 are each formed by continuous arc-shaped irregularities.

[0020] In this embodiment, the phase of the first wave-shaped portion 52 and the phase of the second wave-shaped portion 54 are out of sync. More specifically, as shown in Figures 2 and 3, the first wave-shaped portion 52 has a wave shape in which convex portions 52a and concave portions 52b are arranged alternately, and the second wave-shaped portion 54 has a wave shape in which convex portions 54a and concave portions 54b are arranged alternately. However, the concave portions 52b in the first wave-shaped portion 52 and the convex portions 54a in the second wave-shaped portion 54 are located at approximately the same position in the longitudinal direction of the arms 30 and 40. Also, the convex portions 52a in the first wave-shaped portion 52 and the concave portions 54b in the second wave-shaped portion 54 are located at approximately the same position in the longitudinal direction of the arms 30 and 40.

[0021] Thus, in this embodiment, the spreader 10 and arms 30 and 40 have a phase difference between the phase of the first wave-shaped portion 52 and the phase difference between the phase of the second wave-shaped portion 54 of the anti-slip portion 50. Therefore, vertical and lateral slippage of the pair of arms 30 and 40 during widening operations can be effectively prevented.

[0022] The mechanism will be explained in more detail. In this embodiment, as shown in Figure 2, the recess 52b in the first wave-shaped portion 52 and the convex portion 54a in the second wave-shaped portion 54 are positioned at approximately the same location in the longitudinal direction of the arms 30 and 40. With this configuration, when the anti-slip portion 50 comes into contact with an object (specifically, the door or structure of an accident vehicle that is trying to widen a gap), the first wave-shaped portion 52 and the second wave-shaped portion 54 act on the object in different ways.

[0023] First, let's explain the anti-slip effect. During the widening of an object by the spreader 10, the arms 30 and 40 may be subjected to lateral forces (directions perpendicular to the longitudinal direction of the arms). In this embodiment, the convex portion 52a of the first wave-shaped portion 52 and the convex portion 54a of the second wave-shaped portion 54 are arranged in a staggered pattern with respect to the longitudinal direction of the arms. Therefore, when the anti-slip portion 50 is embedded in the object, the convex portion of one wave-shaped portion forms an effective step between it and the concave portion of the other wave-shaped portion, functioning as a physical wall that restricts the lateral movement of the object. This effectively suppresses lateral slippage, which was difficult to prevent with conventional spreaders.

[0024] Next, the anti-slip effect in the vertical direction will be explained. By shifting the phases of the first wave-shaped portion 52 and the second wave-shaped portion 54, the number of protrusions (edges) that come into contact with the object is substantially doubled compared to an anti-slip portion composed of a single wave shape. This improves the penetration into the object and allows the object to be gripped at more points, resulting in a strong grip. Furthermore, the two rows of wave-shaped portions 52 and 54 with shifted phases can contact the surface shape of the object more flexibly, optimizing the contact area. This allows force to be efficiently transmitted to the object, contributing to an even greater grip. As a result, strong resistance can be generated against vertical slippage, preventing the arms 30 and 40 from sliding forward or backward.

[0025] As described above, the spreader 10 and arms 30 and 40 according to this embodiment can prevent both lateral and longitudinal slippage simultaneously, thereby dramatically improving the stability and safety of widening operations.

[0026] In the above embodiment, a configuration in which the anti-slip portion 50 is formed integrally with the arms 30 and 40 (integrated arm type) was described as an example, but this disclosure is not limited to this. For example, as shown in Figure 4, auxiliary devices 136 and 146, each having an anti-slip portion 150 provided externally, may be detachably attached to the main bodies of the arms 130 and 140.

[0027] The spreader 110 shown in Figure 4 comprises a cylindrical body 120 containing a hydraulic pump 122, a base 124 provided at the tip of the body 120, and a pair of arms 130 and 140 attached to the base 124. Here, the first arm 130 is rotatable around the base 124 about an axis 126. The second arm 140 is also rotatable around the base 124 about an axis 128.

[0028] Furthermore, a piston member 160 is provided inside the base 124. This piston member 160 reciprocates in the longitudinal direction of the spreader 110 by pressurized oil supplied from a hydraulic pump 122 built into the main body 120. A first connecting member 134 and a second connecting member 144 are connected to the tip of the piston member 160, respectively. The first connecting member 134 is rotatable around the shaft 162 relative to the piston member 160. This first connecting member 134 is also rotatable around the shaft 132 relative to the first arm 130. As a result, when the piston member 160 reciprocates, the first connecting member 134 is pulled towards the main body 120 by the piston member 160 or pushed out from the main body 120, causing the first arm 130 to rotate around the shaft 126 relative to the base 124.

[0029] Furthermore, the second connecting member 144 is rotatable around the shaft 164 relative to the piston member 160. Also, this second connecting member 144 is rotatable around the shaft 142 relative to the second arm 140. As a result, when the piston member 160 moves back and forth, the second connecting member 144 is pulled towards the main body 120 by the piston member 160 or pushed out from the main body 120, causing the second arm 140 to rotate around the shaft 128 relative to the base 124.

[0030] A first auxiliary device 136 is detachably attached to the tip of the first arm 130. The first auxiliary device 136 can be detachably attached to the tip of the first arm 130 by a mounting member 138. Similarly, a second auxiliary device 146 is detachably attached to the tip of the second arm 140. The second auxiliary device 146 can be detachably attached to the tip of the second arm 140 by a mounting member 148. Anti-slip portions 150 are provided on the outside of these first auxiliary devices 136 and second auxiliary devices 146. The configuration of the anti-slip portion 150 is substantially the same as the configuration of the anti-slip portion 50 shown in Figures 1 to 3. That is, the anti-slip portion 150 has a first wave-shaped portion that extends along the longitudinal direction of the first arm 130 and the second arm 140, and a second wave-shaped portion that is arranged in parallel with the first wave-shaped portion. Here, the first wave-shaped portion and the second wave-shaped portion are each formed by continuous arc-shaped irregularities.

[0031] In the spreader 110 shown in Figure 4, the phase of the first wave-shaped portion and the phase of the second wave-shaped portion are out of sync. More specifically, the concave portion in the first wave-shaped portion and the convex portion in the second wave-shaped portion are located at approximately the same position along the longitudinal direction of the arms 130 and 140. Also, the convex portion in the first wave-shaped portion and the concave portion in the second wave-shaped portion are located at approximately the same position along the longitudinal direction of the arms 130 and 140.

[0032] Thus, in the auxiliary devices 136 and 146 shown in Figure 4, similar to the spreader 10 and arms 30 and 40 shown in Figure 1, the phase of the first wave-shaped portion of the anti-slip section 150 and the phase of the second wave-shaped portion are offset, which effectively prevents vertical and lateral slippage during widening operations of the pair of arms 130 and 140.

[0033] Furthermore, this configuration using auxiliary tools makes it possible to select the optimal material for each component. For example, the main bodies of the first arm 130 and the second arm 140 can be made of a lightweight metal such as aluminum alloy, while the first auxiliary tool 136 and the second auxiliary tool 146, which require high hardness and wear resistance, can be made of an iron-based metal. This makes it possible to achieve both improved workability through overall weight reduction of the device and the need to ensure durability of the tip, which are often conflicting requirements.

[0034] <Note> The matters described in the above embodiments are noted below.

[0035] (Note 1) A spreader (10) equipped with a pair of arms (30, 40) used to spread an object, An anti-slip portion (50) is provided on the outer side of at least one of the arms (30, 40). The anti-slip portion (50) has a first wave-shaped portion (52) that extends along the longitudinal direction of the arms (30, 40) and a second wave-shaped portion (54) that is arranged in parallel with the first wave-shaped portion (52). The phase of the first wave shape portion (52) and the phase of the second wave shape portion (54) are out of sync.

[0036] With such a spreader (10), the two phase-shifted wave-shaped sections (52, 54) act in combination on the object, effectively preventing both vertical and horizontal slippage simultaneously. This significantly improves stability and safety during widening operations at rescue sites and other locations.

[0037] (Note 2) In the spreader (10) described in Appendix 1, The concave portion (52b) in the first wave-shaped portion (52) and the convex portion (54a) in the second wave-shaped portion (54) are positioned at approximately the same location in the longitudinal direction of the arms (30, 40).

[0038] With this configuration, the convex portions (52a, 54a) of the two wave-shaped sections (52, 54) are arranged in a staggered pattern, thus functioning as a physical barrier that restricts lateral movement relative to the object. As a result, resistance to lateral sliding is significantly improved, enabling more stable widening operations.

[0039] (Note 3) In the spreader (10) described in Appendix 1, The first wave-shaped portion (52) and the second wave-shaped portion (54) are each formed by continuous arc-shaped irregularities.

[0040] With this configuration, the edges of the protrusions are not sharp, allowing them to smoothly bite into the object. This prevents excessive damage to the object while providing a secure grip.

[0041] (Note 4) In the spreader (10) described in Appendix 1, The anti-slip part (50) is made of metal.

[0042] With this configuration, the anti-slip portion (50) has high strength and wear resistance, so deformation and wear are less likely to occur even under harsh usage environments, and stable anti-slip performance can be maintained over a long period of time.

[0043] (Note 5) In the spreader (110) described in Appendix 1, The anti-slip portion (150) is configured as an auxiliary device (136, 146) that can be attached to and detached from the main body of the arm (130, 140).

[0044] With this configuration, even if the anti-slip part (150) wears out, only the auxiliary parts (136, 146) need to be replaced, resulting in excellent maintainability and contributing to a longer lifespan for the entire device and reduced running costs. Furthermore, it is possible to replace the auxiliary parts with those having different characteristics depending on the work being done.

[0045] (Note 6) In the arms (30, 40) of the spreader (10) used to spread an object, The outside of the arms (30, 40) is provided with an anti-slip part (50), The anti-slip portion (50) has a first wave-shaped portion (52) that extends along the longitudinal direction of the arms (30, 40) and a second wave-shaped portion (54) that is arranged in parallel with the first wave-shaped portion (52). The phase of the first wave shape portion (52) and the phase of the second wave shape portion (54) are out of sync.

[0046] With such arms (30, 40), the two phase-shifted wave-shaped sections (52, 54) act in combination on the object, effectively preventing both vertical and lateral slippage simultaneously. As a result, the spreader equipped with these arms improves the stability and safety of widening operations.

[0047] (Note 7) In an auxiliary device (136, 146) that is detachably attached to the arms (130, 140) of a spreader used to spread an object, The auxiliary device (136, 146) has a first wave-shaped portion extending along the longitudinal direction of the arm (130, 140) and a second wave-shaped portion arranged in parallel with the first wave-shaped portion. The phase of the first wave shape is out of sync with the phase of the second wave shape.

[0048] These auxiliary devices (136, 146) allow for easy attachment to the arms (130, 140) to effectively prevent vertical and lateral slippage of the spreader. Furthermore, their detachable design facilitates easy replacement when worn, ensuring excellent maintainability, and allows for the selection of the optimal anti-slip function for the workpiece.

[0049] Furthermore, the spreader according to the present invention is not limited to the embodiments described above, and various modifications can be made.

[0050] For example, the anti-slip portion consisting of the first wave-shaped portion and the second wave-shaped portion is not limited to being provided on both of the pair of arms. In a modified spreader, the anti-slip portion consisting of the first wave-shaped portion and the second wave-shaped portion may be provided on only one of the pair of arms.

[0051] Furthermore, although the phase of the first wave-shaped portion and the phase of the second wave-shaped portion constituting the anti-slip section are misaligned, the concave portion of the first wave-shaped portion and the convex portion of the second wave-shaped portion do not necessarily have to be positioned at approximately the same location in the longitudinal direction of the arm. In other words, the degree of misalignment between the phase of the first wave-shaped portion and the phase of the second wave-shaped portion constituting the anti-slip section is not limited to those shown in Figures 1 to 3.

[0052] Furthermore, the shape of the anti-slip portion, which consists of the first wave-shaped portion and the second wave-shaped portion, is not limited to those shown in Figures 1 to 3. As long as the phases of the first wave-shaped portion and the second wave-shaped portion are offset, various shapes other than those shown in Figures 1 to 3 can be used for the anti-slip portion. [Explanation of symbols]

[0053] 10 Spreaders 20 Main unit 22 Hydraulic pumps 24 base 26 axes 28 axes 30 First Arm 40. Second Arm 50 Anti-slip part 52 1st wave shape part 52a Convex part 52b Recess 54 Second wave shape part 54a Convex part 54b recess 110 Spreader 120 Main Unit 122 Hydraulic pump 124 base 126 axes 128 axes 130 First Arm 132 axes 134 First connecting member 136 1st Auxiliary Device 138 Mounting components 140 Second Arm 142 axes 144 Second connecting member 146 Second aid 148 Mounting components 150 Anti-slip part 160 Piston Member 162 axes 164 axes

Claims

1. A spreader having a pair of arms, used for spreading an object, An anti-slip portion is provided on at least one outer side of the aforementioned arm. The anti-slip portion has a first wave-shaped portion extending along the longitudinal direction of the arm and a second wave-shaped portion arranged in parallel with the first wave-shaped portion. A spreader in which the phase of the first wave-shaped portion and the phase of the second wave-shaped portion are out of sync.

2. The spreader according to claim 1, wherein the recess in the first wave-shaped portion and the convex portion in the second wave-shaped portion are arranged at the same position in the longitudinal direction of the arm.

3. The spreader according to claim 1, wherein the first wave-shaped portion and the second wave-shaped portion are each formed by continuous arc-shaped irregularities.

4. The spreader according to claim 1, wherein the anti-slip portion is made of metal.

5. The spreader according to claim 1, wherein the anti-slip portion is configured as an auxiliary device that can be attached to and detached from the main body of the arm.

6. An arm of a spreader used to spread an object, The outside of the aforementioned arm is provided with an anti-slip part. The anti-slip portion has a first wave-shaped portion extending along the longitudinal direction of the arm and a second wave-shaped portion arranged in parallel with the first wave-shaped portion. An arm in which the phase of the first wave-shaped portion and the phase of the second wave-shaped portion are out of sync.

7. An auxiliary device that is detachably attached to the arm of a spreader used to spread an object, The auxiliary device has a first wave-shaped portion extending along the longitudinal direction of the arm, and a second wave-shaped portion arranged parallel to the first wave-shaped portion. An auxiliary device in which the phase of the first wave-shaped portion and the phase of the second wave-shaped portion are out of sync.

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