Dilator, arm and adjunct

Abstract

The utility model provides an expander, arm and auxiliary spare. A kind of expander (10), it has a pair of arms (30,40), for opening object, wherein, at the outside of at least one of arm (30,40) is provided with antiskid portion (50), antiskid portion (50) has the 1st wave shape portion (52) extending along the length direction of arm (30,40) and the 2nd wave shape portion (54) being arranged in parallel with the 1st wave shape portion (52), the phase of the 1st wave shape portion (52) is staggered with the phase of the 2nd wave shape portion (54).

Description

Technical Field

[0001] This utility model relates to an expander, an arm, and auxiliary components. Background Technology

[0002] Conventionally, rescue devices used to pry open doors or gaps in structures of accident vehicles at rescue sites utilize portable spreaders with a pair of arms that open and close by rotating relative to a base. Such spreaders are known by way of devices disclosed in, for example, Japanese Patent Publication No. 2021-020293 (JP2021-020293A). Utility Model Content

[0003] As in patent document 1 Figure 3 As shown, in order to reliably hold the object and prevent slippage, a wave-shaped (serrated) textured surface (anti-slip part) is provided at the front end of the spreader arm. However, in conventional arms, the textured surface is formed by a single pattern, which has the problem that it may not be able to fully perform its function in the face of complex forces, especially lateral slippage, that the arm is subjected to during widening operations.

[0004] This disclosure was made with the consideration of the following point in mind, and its purpose is to provide an expander, arm, and auxiliary component that can effectively prevent longitudinal and lateral slippage of a pair of arms during widening operations.

[0005] The expander disclosed herein has a pair of arms for spreading an object, wherein an anti-slip portion is provided on the outer side of at least one of the arms, the anti-slip portion having a first wave-shaped portion extending along the length 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 being phase-shifted from the phase of the second wave-shaped portion.

[0006] In the expander disclosed herein, the concave portion of the first wave-shaped portion and the convex portion of the second wave-shaped portion may also be positioned at approximately the same location along the length of the arm.

[0007] In the expander of this disclosure, the first wave-shaped portion and the second wave-shaped portion can be formed by continuous arc-shaped convex and concave shapes, respectively.

[0008] In the expander disclosed herein, the anti-slip portion may be made of metal.

[0009] In the expander of this invention, the anti-slip part can be configured as an auxiliary component that can be attached to and detached from the main body of the arm.

[0010] The arm disclosed herein is an arm for an expander used to open an object, wherein an anti-slip portion is provided on the outer side of the arm, the anti-slip portion having a first wave-shaped portion extending along the length 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 being offset from the phase of the second wave-shaped portion.

[0011] The auxiliary component disclosed herein is detachably mounted on the arm of an expander for opening an object, wherein the auxiliary component has a first wave-shaped portion extending along the length 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 being phase-shifted from the phase of the second wave-shaped portion.

[0012] According to the present disclosure, it is possible to provide an expander, arm, and auxiliary component that can effectively prevent longitudinal and lateral slippage of a pair of arms during widening operations. Attached Figure Description

[0013] Figure 1 This is a perspective view showing the structure of the expander in this embodiment.

[0014] Figure 2 yes Figure 1 A top view of the arm in the expander shown.

[0015] Figure 3 yes Figure 2 The side view of the arm shown.

[0016] Figure 4 This is a perspective view showing other structures of the expander in this embodiment. Detailed Implementation

[0017] The embodiments of this utility model will now be described with reference to the accompanying drawings. Figures 1 to 3 This is a diagram showing the structure of the expander 10 of this embodiment and a pair of arms 30, 40 of the expander 10.

[0018] First, use Figure 1 The structure of the expander 10 in this embodiment will be described. For example... Figure 1 As shown, the expander 10 includes a cylindrical body 20 with a built-in hydraulic pump 22, a base 24 located at the front end of the body 20, and a pair of arms 30 and 40 respectively mounted on the base 24. The first arm 30 is rotatable relative to the base 24 about an axis 26. The second arm 40 is rotatable relative to the base 24 about an axis 28. The first arm 30 and the second arm 40 are respectively made of metals such as iron and aluminum.

[0019] A piston member (not shown) is disposed inside the base 24. This piston member reciprocates along the length of the expander 10 by supplying pressurized oil from a hydraulic pump 22 built into the main body 20. Furthermore, a first connecting member (not shown) and a second connecting member (not shown) are respectively connected to the front end of the piston member. The first connecting member is rotatable relative to the piston member about a first axis (not shown). Additionally, the first connecting member is rotatable relative to the first arm 30 about a second axis (not shown). Thus, when the piston member reciprocates, the first connecting member is pulled towards or pushed out of the main body 20 by the piston member, thereby causing the first arm 30 to rotate relative to the base 24 about axis 26.

[0020] Furthermore, the second connecting member is rotatable relative to the piston member about a third axis (not shown). Additionally, the second connecting member is rotatable relative to the second arm 40 about a fourth axis (not shown). Thus, when the piston member reciprocates, the second connecting member is pulled towards or pushed out of the body 20 by the piston member, thereby causing the second arm 40 to rotate relative to the base 24 about axis 28.

[0021] like Figures 1 to 3 As shown, an anti-slip portion 50 is provided near the front end of the outer side of the first arm 30 and the second arm 40. This anti-slip portion 50 is configured as a part of the first arm 30 and the second arm 40. Therefore, the anti-slip portion 50 is made of a metal such as iron or aluminum. The anti-slip portion 50 has a first wave-shaped portion 52 extending along the length direction of the first arm 30 and the second arm 40, and a second wave-shaped portion 54 arranged parallel to 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 protrusions and concavities.

[0022] In this embodiment, the phase of the first wave shape portion 52 is offset from the phase of the second wave shape portion 54. More specifically, as... Figure 2 and Figure 3 As shown, the first wave-shaped portion 52 has a wave shape with alternating convex portions 52a and concave portions 52b, and the second wave-shaped portion 54 has a wave shape with alternating convex portions 54a and concave portions 54b. 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 positioned at approximately the same location along the length of the arms 30 and 40. Furthermore, the convex portions 52a in the first wave-shaped portion 52 and the concave portions 54b in the second wave-shaped portion 54 are positioned at approximately the same location along the length of the arms 30 and 40.

[0023] Thus, in the expander 10, arms 30, and 40 of this embodiment, the phase of the first wave-shaped portion 52 of the anti-slip portion 50 is offset from the phase of the second wave-shaped portion 54, thereby effectively preventing longitudinal and lateral slippage during the widening operation of the pair of arms 30 and 40.

[0024] Its function will be explained in more detail. In this embodiment, such as Figure 2 As shown, the recess 52b of the first wave-shaped portion 52 and the protrusion 54a of the second wave-shaped portion 54 are positioned at approximately the same location along the length of the arms 30 and 40. According to this structure, when the anti-slip portion 50 contacts an object (specifically, the door or structure of an accident vehicle to which the gap is to be widened), the first wave-shaped portion 52 and the second wave-shaped portion 54 act on the object in different forms.

[0025] First, the effect of preventing lateral slippage will be explained. During the widening operation of an object by the expander 10, a lateral force (orthogonal to the length direction of the arm) is sometimes applied to the arms 30 and 40. In this embodiment, the protrusions 52a of the first wave-shaped portion 52 and the protrusions 54a of the second wave-shaped portion 54 are staggered relative to the length direction of the arm. Therefore, when the anti-slip portion 50 engages with the object, the protrusion of one wave-shaped portion forms an effective step between itself and the concave portion of the other wave-shaped portion, functioning as a physical wall to restrict the lateral movement of the object. Thus, lateral slippage, which is difficult to prevent in conventional expanders, can be effectively suppressed.

[0026] Next, the longitudinal slip prevention effect will be explained. By staggering the phases of the first wave-shaped portion 52 and the second wave-shaped portion 54, the number of protrusions (edges) in contact with the object is substantially doubled compared to the anti-slip portion composed of a single wave shape. This increases the grip on the object, allowing for more points of contact and thus providing a strong grip. Furthermore, the staggered phases of the two wave-shaped portions 52 and 54 allow for more flexible contact with the surface shape of the object, optimizing the contact area. This efficiently transfers force to the object, further enhancing the grip. As a result, stronger resistance is generated against longitudinal slippage of the arms 30 and 40 towards the foreground or deeper.

[0027] As described above, the expander 10, arms 30, and 40 of this embodiment can prevent both lateral and longitudinal sliding at the same time, thus significantly improving the stability and safety of the expansion operation.

[0028] Furthermore, in the above embodiments, an example was described using a structure where the anti-slip part 50 is integrally formed with the arms 30 and 40 (an integrated arm type), but this disclosure is not limited to this. For example, as Figure 4As shown, it can also be configured as auxiliary parts 136 and 146 with anti-slip parts 150 on the outside that can be loaded and unloaded relative to the main body of arms 130 and 140.

[0029] Figure 4 The expander 110 shown includes a cylindrical body 120 with a built-in hydraulic pump 122, a base 124 located at the front end of the body 120, and a pair of arms 130 and 140 respectively mounted on the base 124. The first arm 130 is rotatable relative to the base 124 about an axis 126. The second arm 140 is rotatable relative to the base 124 about an axis 128.

[0030] Additionally, a piston member 160 is disposed inside the base 124. This piston member 160 reciprocates along the length of the expander 110 by supplying pressurized oil from a hydraulic pump 122 integrated within the main body 120. Furthermore, a first connecting member 134 and a second connecting member 144 are respectively connected to the front end of the piston member 160. The first connecting member 134 is rotatable relative to the piston member 160 about an axis 162. Additionally, the first connecting member 134 is rotatable relative to the first arm 130 about an axis 132. Thus, when the piston member 160 reciprocates, the first connecting member 134 is pulled towards or pushed out of the main body 120 by the piston member 160, thereby causing the first arm 130 to rotate relative to the base 124 about an axis 126.

[0031] Furthermore, the second connecting member 144 is rotatable relative to the piston member 160 about axis 164. Additionally, the second connecting member 144 is rotatable relative to the second arm 140 about axis 142. Thus, when the piston member 160 reciprocates, the second connecting member 144 is pulled towards or pushed out of the body 120 by the piston member 160, thereby causing the second arm 140 to rotate relative to the base 124 about axis 128.

[0032] A first auxiliary component 136 is detachably mounted to the front end of the first arm 130. The first auxiliary component 136 can be detachably mounted to the front end of the first arm 130 via a mounting member 138. A second auxiliary component 146 is detachably mounted to the front end of the second arm 140 via a mounting member 148. Anti-slip portions 150 are provided on the outer sides of both the first auxiliary component 136 and the second auxiliary component 146. The structure of the anti-slip portions 150 is similar to... Figures 1 to 3The structure of the anti-slip portion 50 shown is substantially the same. That is, the anti-slip portion 150 has a first wave-shaped portion extending along the length direction of the first arm 130 and the second arm 140, and a second wave-shaped portion arranged parallel to the first wave-shaped portion. Here, the first wave-shaped portion and the second wave-shaped portion are each formed by continuous arc-shaped concave and convex shapes.

[0033] exist Figure 4 In the expander 110 shown, the phase of the first wave-shaped portion is also staggered with the phase of the second wave-shaped portion. More specifically, the concave portion of the first wave-shaped portion and the convex portion of the second wave-shaped portion are arranged at approximately the same position along the length of the arms 130 and 140. Furthermore, the convex portion of the first wave-shaped portion and the concave portion of the second wave-shaped portion are arranged at approximately the same position along the length of the arms 130 and 140.

[0034] Thus, in Figure 4 The auxiliary parts 136 and 146 shown are also related to Figure 1 Similarly, in the expansioners 10, arms 30, and 40 shown, the phase of the first wave-shaped portion of the anti-slip portion 150 is staggered with the phase of the second wave-shaped portion, thus effectively preventing longitudinal and lateral slippage during the widening operation of the pair of arms 130 and 140.

[0035] Furthermore, depending on the structure using such auxiliary components, the most suitable material for each component can be selected. For example, the main body of the first arm 130 and the second arm 140 can be made of lightweight metals such as aluminum alloy, while the first auxiliary component 136 and the second auxiliary component 146, which require high hardness and wear resistance, can be made of ferrous metals. In this way, the opposite requirements of improved operability due to the overall lightweighting of the device and ensuring the durability of the front end can be balanced.

[0036] <Postscript>

[0037] The following notes are attached to the matters described in the above embodiments.

[0038] (Postscript 1)

[0039] An expander (10) has a pair of arms (30, 40) for expanding an object, wherein 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) extending along the length direction of the arm (30, 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) being offset.

[0040] According to such an expander (10), the two phase-staggered wave-shaped portions (52, 54) act in combination on the object, thereby effectively preventing both longitudinal and lateral slippage simultaneously. This significantly improves the stability and safety of widening operations at rescue sites, etc.

[0041] (Postscript 2)

[0042] According to the expander (10) described in Appendix 1, the recess (52b) in the first wave-shaped portion (52) and the protrusion (54a) in the second wave-shaped portion (54) are arranged at approximately the same position in the length direction of the arms (30, 40).

[0043] Based on this structure, the protrusions (52a, 54a) of the two wave-shaped portions (52, 54) are arranged in an alternating pattern, thus functioning as a wall in a physical sense to restrict lateral movement relative to the object. As a result, resistance to lateral sliding is significantly improved, enabling more stable widening operations.

[0044] (Note 3)

[0045] According to Appendix 1, the expander 10, wherein the first wave-shaped portion 52 and the second wave-shaped portion 54 are respectively formed by continuous arc-shaped concave and convex shapes.

[0046] Due to this structure, the uneven corners are not sharp, allowing for smooth gripping of the object. This prevents excessive damage to the object and provides a reliable grip.

[0047] (Postscript 4)

[0048] According to Appendix 1, the expander (10) has an anti-slip part (50) made of metal.

[0049] Based on this structure, the anti-slip part (50) has high strength and wear resistance, so it is not easy to deform or wear even in harsh use environments, and can maintain stable anti-slip performance for a long time.

[0050] (Note 5)

[0051] According to Appendix 1, the expander (110) has an anti-slip part (150) configured as an auxiliary part (136, 146) that can be attached and detached from the main body of the arms (130, 140).

[0052] With this structure, even if the anti-slip part (150) wears out, only the auxiliary parts (136, 146) need to be replaced, thus providing excellent maintainability and contributing to the overall longevity of the device and the reduction of operating costs. In addition, auxiliary parts with different characteristics can be replaced depending on the work being performed.

[0053] (Note 6)

[0054] An arm (30, 40) is an arm (30, 40) for expanding an object (10), wherein an anti-slip part (50) is provided on the outside of the arm (30, 40), the anti-slip part (50) has a first wave-shaped portion (52) extending along the length direction of the arm (30, 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.

[0055] With such arms (30, 40), the two phase-staggered wave-shaped portions (52, 54) act in combination on the object, thereby effectively preventing both longitudinal and lateral slippage simultaneously. This improves the stability and safety of the expansion operation of the expander equipped with these arms.

[0056] (Note 7)

[0057] An auxiliary component (136, 146) is detachably mounted on the arm (130, 140) of an expander for opening an object, wherein the auxiliary component (136, 146) has a first wave-shaped portion extending along the length direction of the arm (130, 140) and a second wave-shaped portion arranged parallel to the first wave-shaped portion, the phase of the first wave-shaped portion being staggered from the phase of the second wave-shaped portion.

[0058] With these auxiliary parts (136, 146), simply by installing them on the arms (130, 140), it is easy to add effective protection against longitudinal and lateral slippage of the spreader. Furthermore, due to their easy installation and removal, replacement is convenient when worn, maintenance is excellent, and the optimal anti-slip function can be selected according to the work object.

[0059] Furthermore, the expander of this invention is not limited to the manner described above, and various modifications can be applied.

[0060] For example, the anti-slip portion formed by the first wave-shaped portion and the second wave-shaped portion is not limited to being provided on both of the pair of arms. As a variation of the expander, the anti-slip portion formed by the first wave-shaped portion and the second wave-shaped portion may also be provided only on one of the pair of arms.

[0061] Furthermore, the phase of the first wave-shaped portion constituting the anti-slip part is offset from the phase of the second wave-shaped portion, but the concave portion of the first wave-shaped portion and the convex portion of the second wave-shaped portion do not necessarily need to be positioned at approximately the same location along the length of the arm. That is, the degree of phase offset between the first wave-shaped portion and the second wave-shaped portion constituting the anti-slip part is not limited to... Figures 1 to 3 The degree indicated.

[0062] Furthermore, the shape of the anti-slip portion formed by the first wave-shaped portion and the second wave-shaped portion is not limited to... Figures 1 to 3 The shape shown. As long as the phase of the first wave shape portion is offset from the phase of the second wave shape portion, the shape can be used as an anti-slip part. Figures 1 to 3 Shapes in various ways other than those shown.

Claims

1. An expander having a pair of arms for expanding an object, characterized in that, An anti-slip portion is provided on the outer side of at least one of the arms. The anti-slip portion has a first wave-shaped portion extending along the length direction of the arm and a second wave-shaped portion arranged parallel to the first wave-shaped portion. The phase of the first wave shape portion is offset from the phase of the second wave shape portion.

2. The expander according to claim 1, characterized in that, The concave portion of the first wave-shaped portion and the convex portion of the second wave-shaped portion are positioned at approximately the same location along the length of the arm.

3. The expander according to claim 1, characterized in that, The first wave-shaped portion and the second wave-shaped portion are respectively formed by continuous arc-shaped concave and convex shapes.

4. The expander according to claim 1, characterized in that, The anti-slip part is made of metal.

5. The expander according to claim 1, characterized in that, The anti-slip part is configured as an auxiliary component that can be attached to and detached from the main body of the arm.

6. An arm, which is an arm for expanding an object, characterized in that, An anti-slip part is provided on the outer side of the arm. The anti-slip portion has a first wave-shaped portion extending along the length direction of the arm and a second wave-shaped portion arranged parallel to the first wave-shaped portion. The phase of the first wave shape portion is offset from the phase of the second wave shape portion.

7. An auxiliary component, detachably mounted on the arm of an expander used to open an object, characterized in that, The auxiliary component has a first wave-shaped portion extending along the length direction of the arm and a second wave-shaped portion arranged side by side with the first wave-shaped portion. The phase of the first wave shape portion is offset from the phase of the second wave shape portion.

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